start-ver=1.4 cd-journal=joma no-vol=592 cd-vols= no-issue= article-no= start-page=121751 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2022 dt-pub=20220915 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effect of bond valence sum on the structural modeling of lead borate glass en-subtitle= kn-subtitle= en-abstract= kn-abstract=The structural model of 66.7PbO-33.3B2O3 glass was constructed using a reverse Monte Carlo (RMC) method, in which bond valence sum (BVS) was added as a constraint condition to suppress formation of unrealistic local structures. Based on the crystal structures, the optimal BVS calculating conditions were determined. As a result, BVS distributions with small deviation were successfully achieved without lowering the reproducibility of other experimental constraints. The geometric asymmetry of PbOn polyhedra was evaluated from the eccentric distance between Pb and gravity center of oxygen atoms. The average eccentric distance was shorter than that in the lead borate crystals, indicating less asymmetry of PbOn units in the RMC glass model. The connectivity between BOn and PbOn units was investigated. It was consequently concluded that the glass had a different network structure from the crystal with the same composition, which might be due to the different chemical bonding character between the lead borate glasses and crystals. en-copyright= kn-copyright= en-aut-name=NagaoMasaaki en-aut-sei=Nagao en-aut-mei=Masaaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MukunokiAtsushi en-aut-sei=Mukunoki en-aut-mei=Atsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=ChibaTamotsu en-aut-sei=Chiba en-aut-mei=Tamotsu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=KikuchiTakahiro en-aut-sei=Kikuchi en-aut-mei=Takahiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=SakuragiTomofumi en-aut-sei=Sakuragi en-aut-mei=Tomofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=OwadaHitoshi en-aut-sei=Owada en-aut-mei=Hitoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Environmental Management Center, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=4 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=5 en-affil=JGC Japan Corporation kn-affil= affil-num=6 en-affil=JGC Japan Corporation kn-affil= affil-num=7 en-affil=JGC Japan Corporation kn-affil= affil-num=8 en-affil=Radioactive Waste Management Funding and Research Center kn-affil= affil-num=9 en-affil=Radioactive Waste Management Funding and Research Center kn-affil= en-keyword=Lead borate glass kn-keyword=Lead borate glass en-keyword=Reverse Monte Carlo modeling kn-keyword=Reverse Monte Carlo modeling en-keyword=Bond valence sum kn-keyword=Bond valence sum en-keyword=Coordination polyhedron kn-keyword=Coordination polyhedron END start-ver=1.4 cd-journal=joma no-vol=130 cd-vols= no-issue=8 article-no= start-page=605 end-page=610 dt-received= dt-revised= dt-accepted= dt-pub-year=2022 dt-pub=202281 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Environmental activities on glass in Japan en-subtitle= kn-subtitle= en-abstract= kn-abstract=In general, glass has been recognized as an environmentally friendly material. However, the production of glass requires a lot of heat energy, and the raw materials also emit CO2 at the melting process. In fact, commercial glasses are not easy to recycle. In glass industry of Japan, various efforts have been made so far to reduce the environmental impact of glass. In this paper, not only glass manufacturing technologies but also glass recycling technologies were reviewed, and the future glass production technologies to achieve carbon neutrality were also introduced. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=AkaiTomoko en-aut-sei=Akai en-aut-mei=Tomoko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=3 en-affil=National Institute of Advanced Industrial Science and Technology (AIST) kn-affil= END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=15 article-no= start-page=12795 end-page=12802 dt-received= dt-revised= dt-accepted= dt-pub-year=2022 dt-pub=20220410 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Eco-Benign Orange-Hued Pigment Derived from Aluminum-Enriched Biogenous Iron Oxide Sheaths en-subtitle= kn-subtitle= en-abstract= kn-abstract=Inorganic pigments have been widely used due to their low cost of production, strong hiding power, and chemical resistance; nevertheless, they have limited hue width and chromaticity. To eliminate these disadvantages, we herein propose the use of an ingenious biotemplate technique to produce Al-enriched biogenic iron oxide (BIOX) materials. Spectrophotometric color analysis showed that high levels of Al inclusion on heat-treated BIOX samples produced heightened yellowish hues and lightness. The Al-enriched BIOX sheaths exhibited a stable tubular structure and excellent thermal stability of color tones after heating at high temperatures and repetitive heat treatments. Ultrastructural analysis and mechanical destruction experiments revealed that the highly chromatic orange-hue of these pigments are ascribed probably to an ingenious cylindrical nanocomposite architecture composed of putative Fe-included low crystalline Al oxide regions and hematite particles embedded therein. The present work therefore demonstrates that the bioengineered material can serve as an epochal orange-hued inorganic pigment with low toxicity and marked thermostability that should meet large industrial demand. en-copyright= kn-copyright= en-aut-name=TamuraKatsunori en-aut-sei=Tamura en-aut-mei=Katsunori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OshimaYuri en-aut-sei=Oshima en-aut-mei=Yuri kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=FuseYuta en-aut-sei=Fuse en-aut-mei=Yuta kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NagaokaNoriyuki en-aut-sei=Nagaoka en-aut-mei=Noriyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=KunohTatsuki en-aut-sei=Kunoh en-aut-mei=Tatsuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=NakanishiMakoto en-aut-sei=Nakanishi en-aut-mei=Makoto kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=FujiiTatsuo en-aut-sei=Fujii en-aut-mei=Tatsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=TakadaJun en-aut-sei=Takada en-aut-mei=Jun kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= affil-num=1 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=4 en-affil=Advanced Research Center for Oral and Craniofacial Sciences, Okayama University kn-affil= affil-num=5 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=6 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=7 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= affil-num=8 en-affil=Graduate School of Environmental and Life Science, Okayama University kn-affil= affil-num=9 en-affil=Graduate School of Natural Science and Technology, Okayama University kn-affil= END start-ver=1.4 cd-journal=joma no-vol=19 cd-vols= no-issue=1 article-no= start-page=22 end-page=25 dt-received= dt-revised= dt-accepted= dt-pub-year=2014 dt-pub=201403 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material design for the ceramics coating with high mold releasability by using molecular orbital calculations kn-title=分子軌道計算による高い離型性を有するセラミックスコーティングの材料設計 en-subtitle= kn-subtitle= en-abstract= kn-abstract=　To explore the ceramic materials appropriate for the coatings with high mold releasability, molecular orbital (MO) calculations have been applied to the ceramics with NaCl structure, such as TiN, TiC, CrN, etc. Chemical bonding characters were evaluated based on the MO calculations, which were correlated to the experimental surface free energy. The dispersion and polar components of surface free energy indicated high correlation with the bond overlap population of the surface bonds and the net charge of inside atoms of the cluster models, respectively. Among the ceramic materials investigated, MoN had the lowest surface free energy, being expected to be most suitable as the ceramic coating material with high releasability en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=1 ORCID= en-aut-name=FujiharaJiro en-aut-sei=Fujihara en-aut-mei=Jiro kn-aut-name=藤原二朗 kn-aut-sei=藤原 kn-aut-mei=二朗 aut-affil-num=2 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=3 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name=紅野安彦 kn-aut-sei=紅野 kn-aut-mei=安彦 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境管理センター affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Material design kn-keyword=Material design en-keyword=Ceramic coating kn-keyword=Ceramic coating en-keyword=Releasability kn-keyword=Releasability en-keyword=Molecular orbital calculation kn-keyword=Molecular orbital calculation END start-ver=1.4 cd-journal=joma no-vol=1 cd-vols= no-issue=1 article-no= start-page=108 end-page=113 dt-received= dt-revised= dt-accepted= dt-pub-year=2013 dt-pub=201303 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Distribution behavior of inorganic constituents in chemical recycling processes of a municipal waste slag en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=OmuraKohei en-aut-sei=Omura en-aut-mei=Kohei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Environmental Management Center, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=4 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Chemical recycling of wastes kn-keyword=Chemical recycling of wastes en-keyword=Glass kn-keyword=Glass en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Dissolution–reprecipitation kn-keyword=Dissolution–reprecipitation en-keyword=Elemental mapping kn-keyword=Elemental mapping END start-ver=1.4 cd-journal=joma no-vol=33 cd-vols= no-issue= article-no= start-page=6 end-page=12 dt-received= dt-revised= dt-accepted= dt-pub-year=2012 dt-pub=201202 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of inorganic slag by wet ball milling kn-title=湿式ボールミル法を用いた無機性産業廃棄物の再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The possibility of material recycling of inorganic slag by wet ball milling with distilled water and an ethylenediaminetetraacetic acid disodium salt dehydrate (EDTA·2Na·2H2O) reagent was investigated. The wet ball milling of the simulated waste slag powder was performed using a ball mill pot and balls in air for 10 - 100 h at room temperature with the rotational speed fixed at 200 rpm. The fractions of CaO and Fe2O3 in the specimens obtained by wet-ball-milling the simulated waste slag powder decreased, that of SiO2 increased, and those of Al2O3 and Na2O hardly changed. These specimens contained 0.1 – 0.8mass% ZrO2. Appropriate solution and time for wet ball milling were 300 ml distilled water and 20 h, respectively. When the wet ball milling of the simulated waste slag powder was performed twice, the fractions of CaO, Al2O3 and Fe2O3 in the specimen obtained after repeated wet ball milling decreased, those of SiO2 and ZrO2 increased and that of Na2O hardly changed in comparison with those in the specimen wet-ball-milled once. The insoluble end product obtained by soaking the specimen wet-ball-milled once in 6M HCl for 20 hours was composed of 98.5mass% SiO2 and 0.6mass% or less other oxides and is usable as glass material. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name=紅野安彦 kn-aut-sei=紅野 kn-aut-mei=安彦 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Inorganic slag kn-keyword=Inorganic slag en-keyword=EDTA kn-keyword=EDTA en-keyword=Wet ball milling kn-keyword=Wet ball milling en-keyword=Recycling kn-keyword=Recycling END start-ver=1.4 cd-journal=joma no-vol=113 cd-vols= no-issue=1313 article-no= start-page=44 end-page=50 dt-received= dt-revised= dt-accepted= dt-pub-year=2005 dt-pub=200501 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=酸化物ガラスの塩基度と XPS による O1s 化学シフトの相関に関する考察 kn-title=Consideration on the Correlation between Basicity of Oxide Glasses and O1s Chemical Shift in XPS en-subtitle= kn-subtitle= en-abstract= kn-abstract=O1s binding energy measured by X-ray photoelectron spectroscopy (XPS) is candidate as a new tool to determine a new scale of Lewis basicity of oxide ions in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, were compared with the experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use needed some modification in parameters. A new empirical expression introduced in this paper gives a new concept and universal scale of basicity. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=1 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=2 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Environmental Chemistry and Materials, Okayama University affil-num=2 en-affil= kn-affil=Department of Environmental Chemistry and Materials, Okayama University affil-num=3 en-affil= kn-affil=Health and Environment Center, Okayama University en-keyword=XPS kn-keyword=XPS en-keyword=Basicity kn-keyword=Basicity en-keyword=Glass kn-keyword=Glass en-keyword=O1s binding energy kn-keyword=O1s binding energy en-keyword=Chemical shift kn-keyword=Chemical shift END start-ver=1.4 cd-journal=joma no-vol=116 cd-vols= no-issue=1350 article-no= start-page=220 end-page=223 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200802 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Chemical recycling of inorganic wastes by using phase separation of glass en-subtitle= kn-subtitle= en-abstract= kn-abstract=A chemical recycling process using phase separation of glass was applied to a granulated blast furnace slag with high CaO content. Glasses were prepared by adding B(2)O(3) to the slag in order to promote phase separation, and the glasses were heat-treated above glass transition temperature. In the subsequent acid-treatment, however, gelation due to the elution of SiO(2) phase containing CaO occurred, not obtaining high SiO(2) solids. Then, pretreatment was introduced to reduce CaO content in slag, where the raw slag was briefly washed in acid. The slag glasses prepared from the pretreated slag were commonly phase-separated by heat-treatment regardless of B(2)O(3) content. After subsequent acid-treatment, colorless insoluble solids were successfully recovered. The end products consist of 70-90 mass% SiO(2), and coloring ions such as Mn, Fe and Cr were almost completely removed from the slag glasses. Reutilization as raw materials for glass is expected. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MikamiShuhei en-aut-sei=Mikami en-aut-mei=Shuhei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ImaokaTakuya en-aut-sei=Imaoka en-aut-mei=Takuya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=4 en-affil= kn-affil=Health and Environment Center, Okayama University affil-num=5 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Blast furnace slag kn-keyword=Blast furnace slag en-keyword=Waste recycling kn-keyword=Waste recycling en-keyword=Chemical recycling kn-keyword=Chemical recycling en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=117 cd-vols= no-issue=1371 article-no= start-page=1195 end-page=1198 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=200911 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Chemical recycling of municipal waste slag by using phase separation en-subtitle= kn-subtitle= en-abstract= kn-abstract=A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B(2)O(3) was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe(2)O(3), K(2)O, and S. Transparent and colorless solids containing ca. 80 mass% of SiO(2) were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KurodaYutaro en-aut-sei=Kuroda en-aut-mei=Yutaro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Faculty of Environmental Science and Technology, Okayama University affil-num=3 en-affil= kn-affil=Environmental Management Center, Okayama University affil-num=4 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Municipal waste slag kn-keyword=Municipal waste slag en-keyword=Waste recycling kn-keyword=Waste recycling en-keyword=Chemical recycling kn-keyword=Chemical recycling en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=118 cd-vols= no-issue=1379 article-no= start-page=603 end-page=607 dt-received= dt-revised= dt-accepted= dt-pub-year=2010 dt-pub=201007 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Phase separation of borosilicate glass containing sulfur en-subtitle= kn-subtitle= en-abstract= kn-abstract=A 10Na(2)S·30B(2)O(3)·60SiO(2) (mol %) glass was prepared, and the changes in glass structure and chemical state of sulfur caused by phase separation were investigated. In the as-prepared and heat-treated glasses, sulfur was present as S(2)− anion and polysulfide S(2)− and S(3)− anions, and Si–S and B–S bonds were not confirmed. A phase separation by spinodal decomposition was observed after heat-treatment, where sulfur was preferentially distributed to borate-rich phase. Even after the phase separation, formation of non-bridging oxygen was not recognized. The preferential distribution of sulfur anions in the present glass was explainable on the basis of the change in population of sodium ions, which compensated the negatively-charged sulfur anions. en-copyright= kn-copyright= en-aut-name=SaikiKeiji en-aut-sei=Saiki en-aut-mei=Keiji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=2 en-affil= kn-affil=Environmental Management Center, Okayama University affil-num=3 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University affil-num=4 en-affil= kn-affil=Graduate School of Environmental Science, Okayama University en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Borosilicate glass kn-keyword=Borosilicate glass en-keyword=Chemical state of sulfur kn-keyword=Chemical state of sulfur en-keyword=Glass structure kn-keyword=Glass structure END start-ver=1.4 cd-journal=joma no-vol=31 cd-vols= no-issue= article-no= start-page=26 end-page=31 dt-received= dt-revised= dt-accepted= dt-pub-year=2009 dt-pub=200912 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of inorganic sludge by wet ball milling kn-title=湿式ボールミル法を用いた無機性汚泥の再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The possibility of material recycling of inorgamic sludge by wet ball milling with distrilled water and an ethylenediaminetetraacetic acid disodium salt dehydrate (EDTA・2Na・2H(2)O)reagent was investigated. The inorganic sludge consisted of 14.1mass% of the heat-treated sludge obtained after drying and heat treatment, 20.1mass% of active carbon, and 65.9mass% of water. The wet ball milling of the heat-treated sludge was performed using a ball pot and balls in air for 40 h at room temperature with the rotational speed fixed at 200rpm. The fractions of Mn, Fe, Ni, Cu, and Zr in the specimens obtained by wet-ball-milling the heat-treated sludge decreased and those of Si and Al increased. Appropriate content of distilled water and weight of the heat-treated sludge for wet ball milling were 150-250 ml and 4.5 g or less, respectively. When the wet ball milling of the heat-treated sludge was perfomed twice,the fractions of Mn, Fe, Ni, Cu, and Zr in the specimen obtained after repeated wet ball milling remarkably decreased and that of Si increased in comparison with those in the specimens wet-ball-milled once. This suggests that the repeat of wet ball milling of the heat-treated sludge leads to a colorless specimen without colored ions such as Mn, Fe, Ni, and Cu. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=KurodaRyusuke en-aut-sei=Kuroda en-aut-mei=Ryusuke kn-aut-name=黒田龍介 kn-aut-sei=黒田 kn-aut-mei=龍介 aut-affil-num=2 ORCID= en-aut-name=BeninoYasuhiko en-aut-sei=Benino en-aut-mei=Yasuhiko kn-aut-name=紅野安彦 kn-aut-sei=紅野 kn-aut-mei=安彦 aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Inorganic sludge kn-keyword=Inorganic sludge en-keyword=EDTA kn-keyword=EDTA en-keyword=Wet ball milling kn-keyword=Wet ball milling en-keyword=Recycling kn-keyword=Recycling END start-ver=1.4 cd-journal=joma no-vol=68 cd-vols= no-issue=24 article-no= start-page=5103 end-page=5111 dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=20041215 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A theoretical interpretation of the chemical shift of Si-29 NMR peaks in alkali borosilicate glasses en-subtitle= kn-subtitle= en-abstract= kn-abstract=In Si-29-NMR, it has so far been accepted that the chemical shifts of Q(n) Species (SiO4 units containing n bridging oxygens) were equivalent between alkali borosilicate, and boron-free alkali silicate classes. In the sodium borosilicate glasses with low sodium content. however. a contradiction was confirmed in the estimation of alkali distributions B-11 NMR suggested that Na ions were entirely distributed to berate groups to form BO4 units, whereas a -90 ppm component Was also observed in Si-29-NMR spectra, which has been attributed to Q(3) species associated with a nonbridging oxygen (NBO). Then. cluster molecular orbital calculations were performed to interpret the -90 ppm component in the borosilicate, glasses. It Was found that a silicon atom which had two tetrahedral borons (B4) as its second nearest neighbors was similar in atomic charge and Si2p energy to the Q(3) species in boron-free alkali silicates. Unequal distribution of electrons in Si-O-B4 bridging bonds was also found. where much electrons Were localized oil the Si-O bonds. It was finally concluded that the Si-O-B4 bridges with narrow bond angle were responsible for the -90 ppm Si-29 component in the borosilicate glasses. There still remained another interpretation: the Q(3) species were actually present in the glasses. and NBOs in the Q(3) species were derived from the tricluster groups. such as (O3Si)O(BO3)(2). In the classes With low sodium content. however. it was concluded that the tricluster groups were not so abundant to contribute to the -90 ppm component. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NishimuraMitsunori en-aut-sei=Nishimura en-aut-mei=Mitsunori kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University en-keyword=short-range order kn-keyword=short-range order en-keyword=nuclear-magnetic-resonance kn-keyword=nuclear-magnetic-resonance en-keyword=mas-nmr kn-keyword=mas-nmr en-keyword=structural kn-keyword=structural en-keyword=groups kn-keyword=groups en-keyword=oxygen sites kn-keyword=oxygen sites en-keyword=ab-initio kn-keyword=ab-initio en-keyword=o-17 nmr kn-keyword=o-17 nmr en-keyword=b-11 kn-keyword=b-11 en-keyword=na20-b2-3-s1-2 kn-keyword=na20-b2-3-s1-2 en-keyword=spectroscopy kn-keyword=spectroscopy END start-ver=1.4 cd-journal=joma no-vol=29 cd-vols= no-issue= article-no= start-page=11 end-page=15 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of blast furnace slag by phase separation of glass kn-title=ガラスの分相現象を利用した高炉水砕スラグの再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel recycling process of blast furnace slag was developed in order to obtain colorless silica－rich solids by using phase separation of borosilicate glass. B(2)O(3) was added to blast furnace slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures. The slag glass prepared from blast furnace slag gelled after the heat treatment and the subsequent three types of acid treatment. The ratios of SiO(2) component in the gels were 40 - 60mass%. On the other hand, phase separation was observed on the surface of the slag glasses prepared from pre-treated slag by 2.5N HCI after the heat treatment. After soaking in acid, they did not gel and changed to insoluble colorless solids. According to compositional analyses, it was found that the insoluble colorless solids contained 70 - 90mass% SiO(2). No colored ions such as Cr, Mn, and Fe were confirmed in the remaining insolubles by optical absorption measurement. Therefore, the colorless silica-rich solids were successfully obtained in the present process. The end products obtained in the present process are expected as material of glass. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=MikamiSyuuhei en-aut-sei=Mikami en-aut-mei=Syuuhei kn-aut-name=三上修平 kn-aut-sei=三上 kn-aut-mei=修平 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraToshinari en-aut-sei=Miura en-aut-mei=Toshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Blast furnace slag kn-keyword=Blast furnace slag en-keyword=Recycling kn-keyword=Recycling en-keyword=Colorless silica-rich solids kn-keyword=Colorless silica-rich solids en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=4 cd-vols= no-issue=1 article-no= start-page=147 end-page=158 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=19990226 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Photoconductive and Photovoltaic Properties in Cadmium Bismuth Aluminate Glasses en-subtitle= kn-subtitle= en-abstract= kn-abstract=Photo-induced phenomena such as photoconductive and photovoltaic effects were investigated for the glasses in CdO-Bi(2)O(3)-Al(2)O(3) system. Photoconductive effect was characterized by a slow decay of photocurrent (persitent photoconductivity). The decay rate decreased with increasing CdO content and decreasing Bi(2)O(3) content. Photovoltage was very small at room temperature but increased to an obvious value on heating. The photoconductivity and photovoltage were increased with CdO content and enhanced by heat treatment in air. The valence band spectra of X-ray photoelectron spectroscopy showed that the hybridization of Cd 4d and O 2p orbitals increases with decreasing Bi(2)O(3) content and increasing CdO content in the glasses. As the results maximum tends to flat. This type of band structure inhibits the rapid recombination of electrons and holes. The persistent photoconductivity of the glasses may be attributed to deep energy level of DX centers. Deep energy levels of the glasses are able to prevent the recombination because they have a repulsive barrier for both electron emission and capture. en-copyright= kn-copyright= en-aut-name=ChenDanping en-aut-sei=Chen en-aut-mei=Danping kn-aut-name=陳丹平 kn-aut-sei=陳 kn-aut-mei=丹平 aut-affil-num=1 ORCID= en-aut-name=WatanabeTomohiro en-aut-sei=Watanabe en-aut-mei=Tomohiro kn-aut-name=渡辺智大 kn-aut-sei=渡辺 kn-aut-mei=智大 aut-affil-num=2 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=3 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Wuhan University of Technology affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=Photoconductivity kn-keyword=Photoconductivity en-keyword=Photovoltage kn-keyword=Photovoltage en-keyword=Persistent photoconductivity kn-keyword=Persistent photoconductivity en-keyword=CdO-Bi(2)O(3)-Al(2)O(3) glasses kn-keyword=CdO-Bi(2)O(3)-Al(2)O(3) glasses en-keyword=Electronic state kn-keyword=Electronic state END start-ver=1.4 cd-journal=joma no-vol=26 cd-vols= no-issue=2 article-no= start-page=61 end-page=67 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=19920328 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Preparation of Mullite Dispersed Silica Ceramics through Sol-Gel Processing en-subtitle= kn-subtitle= en-abstract= kn-abstract=Mullite-dispersed silica ceramics were prepared through sol-gel processing by the use of tetraethoxy silane, aluminium nitrate and aluminium isopropoxide as the Si and Al sources where HCl and HN0(3) were the catalyst. Effect of the starting materials, solvents and catalysts was examined on the gelation time or temperature of mullite precipitation. Apparent activation energy of gelation ranged from 80 to 95kJ/mol. The presence of AI in the sols elongated the gelling time suggesting the formation of chelate bonds between AI and Si-OR or Si-OH bonds. en-copyright= kn-copyright= en-aut-name=OsakaAkiyoshi en-aut-sei=Osaka en-aut-mei=Akiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=KawabataKouji kn-aut-sei=Kawabata kn-aut-mei=Kouji aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=TakadaJun en-aut-sei=Takada en-aut-mei=Jun kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Applied Chemistry affil-num=2 en-affil= kn-affil=Industrial Technology Center of Okayama Prefecture affil-num=3 en-affil= kn-affil=Department of Applied Chemistry affil-num=4 en-affil= kn-affil=Department of Applied Chemistry affil-num=5 en-affil= kn-affil=Department of Applied Chemistry END start-ver=1.4 cd-journal=joma no-vol=26 cd-vols= no-issue=2 article-no= start-page=69 end-page=75 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=19920328 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Preparation and Characterization of Ti(2)O(3) Films Deposited on Sapphire Substrate by Activated Reactive Evaporation Method en-subtitle= kn-subtitle= en-abstract= kn-abstract=(001)-oriented Ti(2)O(3) films were epitaxially grown on a(001)-face of sapphire single-crystalline substrate by an activated reactive evaporation method. The formation ranges of stoichiometric and nonstoichiometric Ti(2)O(3) films were determined as a function of the substrate temperature (Ts), the oxygen pressure (Po(2)) and the deposition rate. Stoichiometric Ti(2)O(3) films were grown at Ts≧673K under Po(2)≧1.0×10(-4)Torr, which showed the metal-insulator transition with a sharp change in electrical resistivity from 3.5×10(-2) to 2.6×10(-3)Ωcm at 361K. Nonstoichiometric films prepared under less oxidized conditions did not exhibit the transition. The nonstoichiometry of the Ti(2)O(3)films was discussed in terms of excess Ti ions. en-copyright= kn-copyright= en-aut-name=FujiiTatsuo en-aut-sei=Fujii en-aut-mei=Tatsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=SakataNaoki kn-aut-sei=Sakata kn-aut-mei=Naoki aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OsakaAkiyoshi en-aut-sei=Osaka en-aut-mei=Akiyoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=TakadaJun en-aut-sei=Takada en-aut-mei=Jun kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= affil-num=1 en-affil= kn-affil=Department of Applied Chemistry affil-num=2 en-affil= kn-affil=Department of Applied Chemistry affil-num=3 en-affil= kn-affil=Department of Applied Chemistry affil-num=4 en-affil= kn-affil=Department of Applied Chemistry affil-num=5 en-affil= kn-affil=Department of Applied Chemistry affil-num=6 en-affil= kn-affil=Department of Applied Chemistry END start-ver=1.4 cd-journal=joma no-vol=28 cd-vols= no-issue= article-no= start-page=28 end-page=33 dt-received= dt-revised= dt-accepted= dt-pub-year=2006 dt-pub=200612 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Studies on optical properties of SnO-based glasses as lead-free glasses kn-title=SnOベースガラスの鉛代替光学ガラスへの応用の検討 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The preparation of SnO-SiO(2), SnO-B(2)O(3), and SnO-GeO(2) glasses by melting in air was performed. The prepared SnO-GeO(2) glasses were large enough to measure optical properties whereas the vitrification in SnO-SiO(2) and SnO-B(2)O(3) systems was difficult. PbO-GeO(2) and BiO(1.5)-GeO(2) glasses were also prepared for comparison with SnO-GeO(2) glasses. The densities, glass transition temperatures, and optical properties such as refractive indices, dispersion, and transmission spectra of SnO-GeO(2), PbO-GeO(2), and BiO(1.5)-GeO(2) glasses were measured. On the basis of the results, the potential for SnO-GeO(2) glasses as lead-free glasses is particularly discussed from the viewpoint of optical properties. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=MasudaKoichi en-aut-sei=Masuda en-aut-mei=Koichi kn-aut-name=増田紘一 kn-aut-sei=増田 kn-aut-mei=紘一 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=SnO-based glasses kn-keyword=SnO-based glasses en-keyword=Lead-free glasses kn-keyword=Lead-free glasses en-keyword=Refractive indices kn-keyword=Refractive indices en-keyword=Dispersion kn-keyword=Dispersion en-keyword=Transmittance kn-keyword=Transmittance en-keyword=Optical properties kn-keyword=Optical properties END start-ver=1.4 cd-journal=joma no-vol=29 cd-vols= no-issue= article-no= start-page=11 end-page=15 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=200710 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material recycling of blast furnace slag by phase separation of glass kn-title=ガラスの分相現象を利用した高炉水砕スラグの再資源化技術の開発 en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel recycling process of blast furnace slag was developed in order to obtain colorless silica-rich solids by using phase separation of borosilicate glass. B(2)O(3) was added to blast furnace slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures. The slag glass prepared from blast furnace slag gelled after the heat treatment and the subsequent three types of acid treatment. The ratios of SiO(2) component in the gels were 40 – 60mass%. On the other hand, phase separation was observed on the surface of the slag glasses prepared from pre-treated slag by 2.5N HCl after the heat treatment. After soaking in acid, they did not gel and changed to insoluble colorless solids. According to compositional analyses, it was found that the insoluble colorless solids contained 70 - 90mass% SiO(2). No colored ions such as Cr, Mn, and Fe were confirmed in the remaining insolubles by optical absorption measurement. Therefore, the colorless silica-rich solids were successfully obtained in the present process. The end products obtained in the present process are expected as material of glass. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=MikamiSyuuhei en-aut-sei=Mikami en-aut-mei=Syuuhei kn-aut-name=三上修平 kn-aut-sei=三上 kn-aut-mei=修平 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学保健環境センター環境安全部門 affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=4 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=Blast furnace slag kn-keyword=Blast furnace slag en-keyword=Recycling kn-keyword=Recycling en-keyword=Colorless silica-rich solids kn-keyword=Colorless silica-rich solids en-keyword=Phase separation kn-keyword=Phase separation en-keyword=Glass kn-keyword=Glass END start-ver=1.4 cd-journal=joma no-vol=30 cd-vols= no-issue= article-no= start-page=39 end-page=44 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200812 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=鉛フリー光学ガラスとしてのSnO-B(2)O(3)ガラスの光学特性 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The preparation of SnO-B(2)O(3) and SnO-SiO(2) glasses by melting in Ar atomosphere was performed. The prepared SnO-B(2)O(3) glasses were large enough to measure optical properties whereas the vitrification in SnO-SiO(2) system was very difficult. PbO-B(2)O(3) and BiO1.5-B(2)O(3) glasses were also prepared for comparison with SnO-B(2)O(3) glasses. The densities, glass transition temperatures, and optical properties such as refractive indices, dispersion, and transmission spectra of SnO-B(2)O(3), PbO-B(2)O(3), and BiO(1.5)-B(2)O(3) glasses were measured. On the basis of the obtained results, the potential for SnO-B(2)O(3) glasses as lead-free glasses is particularly discussed from the viewpoint of optical properties. en-copyright= kn-copyright= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=1 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=2 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学環境管理センター affil-num=2 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 affil-num=3 en-affil= kn-affil=岡山大学環境理工学部環境物質工学科 en-keyword=SnO-B(2)O(3) glasses kn-keyword=SnO-B(2)O(3) glasses en-keyword=Lead-free glasses kn-keyword=Lead-free glasses en-keyword=Refractive indices kn-keyword=Refractive indices en-keyword=Dispersion kn-keyword=Dispersion en-keyword=Transmittance kn-keyword=Transmittance en-keyword=Optical properties kn-keyword=Optical properties END start-ver=1.4 cd-journal=joma no-vol=2 cd-vols= no-issue=1 article-no= start-page=121 end-page=129 dt-received= dt-revised= dt-accepted= dt-pub-year=1997 dt-pub=19970110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Preparation and Properties of ZnO Transparent Conductive Thin Films by Activated Reactive Evaporation Method kn-title=活性化反応蒸着法によるZnO系透明導電膜の作製と物性 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Zinc oxide films were prepared on silica glass substrates by the use of an r.f. activated reactive evaporation (ARE) method, and were examined by X-ray diffraction (XRD) and scanning electron microscope (SEM). The electrical conductivity of the films and the doping effect of Al ions were also investigated. XRD measurements indicate that the films were c-axis oriented and that an r.f. plasma of Zn and O was necessary for the ZnO film deposition. Substrate temperature, oxygen gas pressure, evaporation rate, r.f. power and Al doping amount affect the c-axis orientation, the growth rate, the microstructure of the films and electrical conductivity. Optimum conditions with a fine texture of the surface and having good ctystallinity as well as good conductivity (≒10(-4)Ω・cm) were as follows : the substrate temperature; 200℃, the total evaporation rate; 1.0Å/s, the oxygen pressure; 2.0×10(-4) Torr, the r.f. power; 250W and the Al evaporation rare ratio; 2～6%. The films with 1.0×10(-3)Ω・cm were prepared at 50℃ for the substrate temperature. en-copyright= kn-copyright= en-aut-name=FujiwaraTakashi en-aut-sei=Fujiwara en-aut-mei=Takashi kn-aut-name=藤原貴 kn-aut-sei=藤原 kn-aut-mei=貴 aut-affil-num=1 ORCID= en-aut-name=FujiiTatsuo en-aut-sei=Fujii en-aut-mei=Tatsuo kn-aut-name=藤井達生 kn-aut-sei=藤井 kn-aut-mei=達生 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=TakadaJun en-aut-sei=Takada en-aut-mei=Jun kn-aut-name=高田潤 kn-aut-sei=高田 kn-aut-mei=潤 aut-affil-num=4 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=(堤)松下電器産業株式会社 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 en-keyword=ZnO film kn-keyword=ZnO film en-keyword=Al doped ZnO kn-keyword=Al doped ZnO en-keyword=transparent conductive film kn-keyword=transparent conductive film en-keyword=r.f. activated reactive evaporation method kn-keyword=r.f. activated reactive evaporation method END start-ver=1.4 cd-journal=joma no-vol=3 cd-vols= no-issue=1 article-no= start-page=145 end-page=156 dt-received= dt-revised= dt-accepted= dt-pub-year=1998 dt-pub=19980114 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Consideration for the correlation between basicity of oxide glasses and chemical shift of O1s binding energy in XPS kn-title=酸化物ガラスの塩基度とXPSによるO1ｓ束縛エネルギーの化学シフトの相関に関する考察 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Binding energy of O1s core electron measured in XPS is a candidate to determine new scale of Lewis basicity of oxide ion in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, are compared with experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use need some modification in parameters. A new empirical expression introduced in this paper gives new concept and universal scale of basicity. en-copyright= kn-copyright= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=1 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=119 end-page=125 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20020322 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Upconversion property and light scattering in Tm(3+)-doped glass-ceramics kn-title=Tm(3+)含有結晶化ガラスのアップコンバージョン特性と光散乱 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Glass-ceramics containing Pb(x)Cd(1-x)F(2) microcrystallites were prepared through heat treatment of Tm(3+)/Yb(3+)doped SiO(2)-Al(2)O(3)-PbF(2) glasses. The crystallite size was controlled by varying the heat-treatment time. By changing glass composition, two types of strong optical scattering, Rayleigh and Mie scattering modes were observed for the glass ceramics. In the case of Rayleigh scattering, the scattering region expanded to the long-wavelength side with increasing the heat-treatment time. On the other hand, in the case of Mie scattering, the region were hardly dependent on wavelength, and visible light was widely scattered. It was argued that the different scattering phenomena were caused by the different size of the crystallites or their morphogical texture. Furthermore, the glass-ceramics with strong optical scattering showed higher upconversion fluorescence intensity than the matrix glass. The mechanisms for the enhanced upconversion due to the scattering were discussed. en-copyright= kn-copyright= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=1 ORCID= en-aut-name=DingYong en-aut-sei=Ding en-aut-mei=Yong kn-aut-name=丁勇 kn-aut-sei=丁 kn-aut-mei=勇 aut-affil-num=2 ORCID= en-aut-name=MurataTakashi en-aut-sei=Murata en-aut-mei=Takashi kn-aut-name=村田隆 kn-aut-sei=村田 kn-aut-mei=隆 aut-affil-num=3 ORCID= en-aut-name=HimeiYusuke en-aut-sei=Himei en-aut-mei=Yusuke kn-aut-name=姫井裕助 kn-aut-sei=姫井 kn-aut-mei=裕助 aut-affil-num=4 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 affil-num=5 en-affil= kn-affil=岡山大学 en-keyword=Optical scattering kn-keyword=Optical scattering en-keyword=Glass-ceramics kn-keyword=Glass-ceramics en-keyword=Oxyfluoride glass kn-keyword=Oxyfluoride glass en-keyword=Microcrystallite kn-keyword=Microcrystallite en-keyword=Upconversion fluorescence kn-keyword=Upconversion fluorescence END start-ver=1.4 cd-journal=joma no-vol=7 cd-vols= no-issue=1 article-no= start-page=113 end-page=118 dt-received= dt-revised= dt-accepted= dt-pub-year=2002 dt-pub=20020322 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Effects of ultrasonic treatment on the preparation of transparent glass-ceramic phosphor kn-title=長残光性透明ガラスセラミックスの作製における超音波前処理効果 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The effects of ultrasonic surface treatment (UST) on the crystallization behavior and optical emission properties were investigated for the transparent glass-ceramics prepared from calcium aluminosilicate glasses co-doped with Eu(2+), Nd(3+). The glass-ceramics A were prepared by sintering a glass 45CaO・45Al(2)O(3)・10SiO(2) (mol%) containing 0.5Eu(2)O(3)+1Nd(2)O(3) under a 2% H(2)+98% Ar reducing atmosphere. In the glass-ceramics A, three crystalline phases, CaAl(2)O(4) (CA), CaAl(4)O(7) (CA2) and Ca(2)Al(2)SiO(7) (CAS) were commonly confirmed by X-ray diffraction. No drastic change in the amount of the precipitated crystalline phases was observed even in the case using UST of CA powders. It was suggested that the optical emission properties of the glass-ceramics A was responsible for the CA2 crystals. The glass-ceramics B were also prepared from a 51CaO・42Al(2)O(3)・7SiO(2) glass. The CA crystals were separately precipitated in the glass-ceramics B. In particular, a large amount of CA was successfully produced by stirring the UST suspension to prevent the sedimentation of the UST particles. The glass-ceramic B so-prepared showed strong photoluminescence but weak phosphorescence compared with other glass-ceramics B, indicating that the photoluminescence and phosphorescence were originated in different electron-trapping levels. The amount of the trap levels associated with the long lasting phosphorescence, such as oxygen vacancies, was probably small in the glass-ceramic B prepared with the stirring UST. en-copyright= kn-copyright= en-aut-name=InoueTeruhide en-aut-sei=Inoue en-aut-mei=Teruhide kn-aut-name=井上輝英 kn-aut-sei=井上 kn-aut-mei=輝英 aut-affil-num=1 ORCID= en-aut-name=NakashimaMizuho en-aut-sei=Nakashima en-aut-mei=Mizuho kn-aut-name=中島瑞穂 kn-aut-sei=中島 kn-aut-mei=瑞穂 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=ultrasonic surface treatment (UST) kn-keyword=ultrasonic surface treatment (UST) en-keyword=surface crystallization kn-keyword=surface crystallization en-keyword=glass-ceramics kn-keyword=glass-ceramics en-keyword=long lasting phosphorescence kn-keyword=long lasting phosphorescence en-keyword=calcium aluminosilicate glass kn-keyword=calcium aluminosilicate glass END start-ver=1.4 cd-journal=joma no-vol=9 cd-vols= no-issue=1 article-no= start-page=153 end-page=162 dt-received= dt-revised= dt-accepted= dt-pub-year=2004 dt-pub=20040227 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Evaluation of Surface State of Ceramic Particles Suspended in Aqueous Solution by Potentiometric Titration Method kn-title=電位差適定によるセラミック粉体の表面電位の測定 en-subtitle= kn-subtitle= en-abstract= kn-abstract=Surface states of ceramic particles such as SiO(2), Al(2)O(3), Si(3)N(4) and so on suspended in aqueous alkaline solutions were successfully and easily determined by a potentiometric titration method. Isoelctric point, iep and excess surface charge density were classified and evaluated for many ceramic particles from the view points of aggregation and dispersion of particles and solubility in aqueous solution. en-copyright= kn-copyright= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=1 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=2 ORCID= en-aut-name=ShinodaMasakatsu en-aut-sei=Shinoda en-aut-mei=Masakatsu kn-aut-name=篠田真克 kn-aut-sei=篠田 kn-aut-mei=真克 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 en-keyword=potentiometric titration method kn-keyword=potentiometric titration method en-keyword=isoelctric point kn-keyword=isoelctric point en-keyword=excess surface charge density kn-keyword=excess surface charge density en-keyword=ceramic particle kn-keyword=ceramic particle en-keyword=suspension kn-keyword=suspension en-keyword=aqueous solution kn-keyword=aqueous solution END start-ver=1.4 cd-journal=joma no-vol=12 cd-vols= no-issue=1 article-no= start-page=161 end-page=165 dt-received= dt-revised= dt-accepted= dt-pub-year=2007 dt-pub=20070315 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Material Recycling of Municipal Waste Slags by Using Phase Separation of Glass kn-title=ガラスの相分離を利用した都市ゴミ溶融スラグのマテリアルリサイクル en-subtitle= kn-subtitle= en-abstract= kn-abstract=A novel recycling process of municipal waste slags obtaining Fe-free colorless materials was developed by using a phase separation of borosilicate glass. B(2)O(3) was added to a simulated waste slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures, from which phase separation was successfully induced. The phase-separated slag glasses were still colored in black due to Fe ions, and after soaking in acid, they were successfully bleached, obtaining colorless solids. According to compositional analyses, no Fe ions were confirmed in the remaining insolubles, indicating that Fe ions were preferentially incorporated into the borate-rich phases soluble in acid. The main constituent of the colorless solids was SiO(2) and the end products obtained in the present process were expected as an alternative of pure silica glass. en-copyright= kn-copyright= en-aut-name=ImaokaTakuya en-aut-sei=Imaoka en-aut-mei=Takuya kn-aut-name=今岡卓也 kn-aut-sei=今岡 kn-aut-mei=卓也 aut-affil-num=1 ORCID= en-aut-name=SakidaShinichi en-aut-sei=Sakida en-aut-mei=Shinichi kn-aut-name=崎田真一 kn-aut-sei=崎田 kn-aut-mei=真一 aut-affil-num=2 ORCID= en-aut-name=NanbaTokuro en-aut-sei=Nanba en-aut-mei=Tokuro kn-aut-name=難波徳郎 kn-aut-sei=難波 kn-aut-mei=徳郎 aut-affil-num=3 ORCID= en-aut-name=MiuraYoshinari en-aut-sei=Miura en-aut-mei=Yoshinari kn-aut-name=三浦嘉也 kn-aut-sei=三浦 kn-aut-mei=嘉也 aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 affil-num=2 en-affil= kn-affil=岡山大学 affil-num=3 en-affil= kn-affil=岡山大学 affil-num=4 en-affil= kn-affil=岡山大学 en-keyword=slag kn-keyword=slag en-keyword=recycling kn-keyword=recycling en-keyword=colorless glass kn-keyword=colorless glass en-keyword=phase separation kn-keyword=phase separation END