| JaLCDOI | 10.18926/fest/11475 |
|---|---|
| タイトル（別表記） | Material Recycling of Municipal Waste Slags by Using Phase Separation of Glass |
| フルテキストURL | 012_161_165.pdf |
| 著者 | 今岡 卓也| 崎田 真一| 難波 徳郎| 三浦 嘉也| |
| 抄録 | 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. |
| キーワード | slag recycling colorless glass phase separation |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2007-03-15 |
| 巻 | 12巻 |
| 号 | 1号 |
| 開始ページ | 161 |
| 終了ページ | 165 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313957 |
| JaLCDOI | 10.18926/fest/11476 |
|---|---|
| タイトル（別表記） | Evaluation of Surface State of Ceramic Particles Suspended in Aqueous Solution by Potentiometric Titration Method |
| フルテキストURL | 009_153_162.pdf |
| 著者 | 三浦 嘉也| 難波 徳郎| 篠田 真克| |
| 抄録 | 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. |
| キーワード | potentiometric titration method isoelctric point excess surface charge density ceramic particle suspension aqueous solution |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2004-02-27 |
| 巻 | 9巻 |
| 号 | 1号 |
| 開始ページ | 153 |
| 終了ページ | 162 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313753 |
| JaLCDOI | 10.18926/fest/11538 |
|---|---|
| タイトル（別表記） | Effects of ultrasonic treatment on the preparation of transparent glass-ceramic phosphor |
| フルテキストURL | 007_113_118.pdf |
| 著者 | 井上 輝英| 中島 瑞穂| 難波 徳郎| 三浦 嘉也| |
| 抄録 | 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. |
| キーワード | ultrasonic surface treatment (UST) surface crystallization glass-ceramics long lasting phosphorescence calcium aluminosilicate glass |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 113 |
| 終了ページ | 118 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313433 |
| JaLCDOI | 10.18926/fest/11541 |
|---|---|
| タイトル（別表記） | Upconversion property and light scattering in Tm(3+)-doped glass-ceramics |
| フルテキストURL | 007_119_125.pdf |
| 著者 | 三浦 嘉也| 丁 勇| 村田 隆| 姫井 裕助| 難波 徳郎| |
| 抄録 | 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. |
| キーワード | Optical scattering Glass-ceramics Oxyfluoride glass Microcrystallite Upconversion fluorescence |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2002-03-22 |
| 巻 | 7巻 |
| 号 | 1号 |
| 開始ページ | 119 |
| 終了ページ | 125 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313480 |
| JaLCDOI | 10.18926/fest/11578 |
|---|---|
| タイトル（別表記） | Consideration for the correlation between basicity of oxide glasses and chemical shift of O1s binding energy in XPS |
| フルテキストURL | 003_145_156.pdf |
| 著者 | 難波 徳郎| 三浦 嘉也| |
| 抄録 | 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. |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 1998-01-14 |
| 巻 | 3巻 |
| 号 | 1号 |
| 開始ページ | 145 |
| 終了ページ | 156 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313359 |
| JaLCDOI | 10.18926/fest/11614 |
|---|---|
| タイトル（別表記） | Preparation and Properties of ZnO Transparent Conductive Thin Films by Activated Reactive Evaporation Method |
| フルテキストURL | 002_121_129.pdf |
| 著者 | 藤原 貴| 藤井 達生| 難波 徳郎| 高田 潤| 三浦 嘉也| |
| 抄録 | 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. |
| キーワード | ZnO film Al doped ZnO transparent conductive film r.f. activated reactive evaporation method |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 1997-01-10 |
| 巻 | 2巻 |
| 号 | 1号 |
| 開始ページ | 121 |
| 終了ページ | 129 |
| ISSN | 1341-9099 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002313550 |
| 著者 | 崎田 真一| 難波 徳郎| 三浦 嘉也| |
|---|---|
| 発行日 | 2008-12 |
| 出版物タイトル | 環境制御 |
| 巻 | 30巻 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 崎田 真一| 三上 修平| 難波 徳郎| 三浦 嘉也| |
|---|---|
| 発行日 | 2007-10 |
| 出版物タイトル | 環境制御 |
| 巻 | 29巻 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 崎田 真一| 増田 紘一| 難波 徳郎| 三浦 嘉也| |
|---|---|
| 発行日 | 2006-12 |
| 出版物タイトル | 環境制御 |
| 巻 | 28巻 |
| 資料タイプ | 紀要論文 |
| JaLCDOI | 10.18926/15436 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_26_2_69.pdf |
| 著者 | Fujii, Tatsuo| Sakata Naoki| Nanba, Tokuro| Osaka, Akiyoshi| Miura, Yoshinari| Takada, Jun| |
| 抄録 | (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. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1992-03-28 |
| 巻 | 26巻 |
| 号 | 2号 |
| 開始ページ | 69 |
| 終了ページ | 75 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307639 |
| JaLCDOI | 10.18926/15473 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_26_2_61.pdf |
| 著者 | Osaka, Akiyoshi| Kawabata Kouji| Nanba, Tokuro| Takada, Jun| Miura, Yoshinari| |
| 抄録 | 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. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1992-03-28 |
| 巻 | 26巻 |
| 号 | 2号 |
| 開始ページ | 61 |
| 終了ページ | 67 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307416 |
| JaLCDOI | 10.18926/fest/19742 |
|---|---|
| フルテキストURL | 004_147_158.pdf |
| 著者 | 陳 丹平| 渡辺 智大| 三浦 嘉也| 難波 徳郎| |
| 抄録 | 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. |
| キーワード | Photoconductivity Photovoltage Persistent photoconductivity CdO-Bi(2)O(3)-Al(2)O(3) glasses Electronic state |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 1999-02-26 |
| 巻 | 4巻 |
| 号 | 1号 |
| 開始ページ | 147 |
| 終了ページ | 158 |
| ISSN | 1341-9099 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309190 |
| 著者 | 崎田 真一| 三上 修平| 難波 徳郎| 三浦 嘉也| |
|---|---|
| 発行日 | 2007-10 |
| 出版物タイトル | 環境制御 |
| 巻 | 29巻 |
| 資料タイプ | 紀要論文 |
| 著者 | Nanba, Tokuro| Nishimura, Mitsunori| Miura, Yoshinari| |
|---|---|
| 発行日 | 2004-12-15 |
| 出版物タイトル | Geochimica et Cosmochimica Acta |
| 巻 | 68巻 |
| 号 | 24号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 崎田 真一| 黒田 龍介| 紅野 安彦| 難波 徳郎| |
|---|---|
| 発行日 | 2009-12 |
| 出版物タイトル | 環境制御 |
| 巻 | 31巻 |
| 資料タイプ | 紀要論文 |
| 著者 | Saiki, Keiji| Sakida, Shinichi| Benino, Yasuhiko| Nanba, Tokuro| |
|---|---|
| 発行日 | 2010-07 |
| 出版物タイトル | Journal of the Ceramic Society of Japan |
| 巻 | 118巻 |
| 号 | 1379号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | Nanba, Tokuro| Kuroda, Yutaro| Sakida, Shinichi| Benino, Yasuhiko| |
|---|---|
| 発行日 | 2009-11 |
| 出版物タイトル | Journal of the Ceramic Society of Japan |
| 巻 | 117巻 |
| 号 | 1371号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | Nanba, Tokuro| Mikami, Shuhei| Imaoka, Takuya| Sakida, Shinichi| Miura, Yoshinari| |
|---|---|
| 発行日 | 2008-02 |
| 出版物タイトル | Journal of the Ceramic Society of Japan |
| 巻 | 116巻 |
| 号 | 1350号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 難波 徳郎| 三浦 嘉也| 崎田 真一| |
|---|---|
| 発行日 | 2005-01 |
| 出版物タイトル | Journal of the Ceramic Society of Japan |
| 巻 | 113巻 |
| 号 | 1313号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 崎田 真一| 紅野 安彦| 難波 徳郎| |
|---|---|
| 発行日 | 2012-02 |
| 出版物タイトル | 環境制御 |
| 巻 | 33巻 |
| 資料タイプ | 紀要論文 |