The acid-base properties of the ZnBr[2]-NaBr melts at 623 K were investigated on the basis of the electromotive force measurements of a zinc-zinc concentration cell. The following two chemical equilibria were postulated to describe the acid-base character of the melts ZBnr[2]+Br[-]=ZnBr[3][-] K[1] ZnBr[3][-]+Br[-] =ZnBr[4][2+] K[2] The equilibrium constants K[1] and K[2], were determined to be 5.0~10, and 1.0~10[2], respectively, at 623 K
en-copyright= kn-copyright= en-aut-name=HayashiHidetaka en-aut-sei=Hayashi en-aut-mei=Hidetaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=HayashiN en-aut-sei=Hayashi en-aut-mei=N kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakeharaZ en-aut-sei=Takehara en-aut-mei=Z kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KatagiriA en-aut-sei=Katagiri en-aut-mei=A kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Kyoto University affil-num=3 en-affil= kn-affil=Kyoto University affil-num=4 en-affil= kn-affil=Kyoto University en-keyword=liquid mixtures kn-keyword=liquid mixtures en-keyword=aluminium compounds kn-keyword=aluminium compounds en-keyword=sodium compounds kn-keyword=sodium compounds en-keyword=bromine compounds kn-keyword=bromine compounds en-keyword=chemical equilibrium kn-keyword=chemical equilibrium en-keyword=electrochemical analysis kn-keyword=electrochemical analysis en-keyword=thermodynamic properties kn-keyword=thermodynamic properties en-keyword=thermochemistry kn-keyword=thermochemistry en-keyword=electric potential kn-keyword=electric potential END start-ver=1.4 cd-journal=joma no-vol=140 cd-vols= no-issue=2 article-no= start-page=362 end-page=365 dt-received= dt-revised= dt-accepted= dt-pub-year=1993 dt-pub=19932 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Codeposition of a-alumina particles from acid copper sulfate bath en-subtitle= kn-subtitle= en-abstract= kn-abstract=The purpose of this work is to elucidate the factors affecting the codeposition of a-alumina particles with copper from an acid copper sulfate bath. The effect of current density and particle concentration in the bath on the amount of codeposited a-alumina were determined. In order to evaluate the surface-chemical properties of the particles, the zeta-potential of a-alumina particles in the plating bath was determined by means of the streaming potential method. The amounts of adsorbed Cu 2+ and SO2( from the plating bath were also determined. The amount of codeposited a-alumina particles was found to be greater than those reported in literature, in spite of the negative zeta-potential values of a-alumina. This indicates that the electrostatic interaction between the particles and the cathode is not the essential factor of the codeposition process. It is considered that the amount of adsorbed Cu 2+ on the a-alumina particle plays an important role in the codeposition behavior.
en-copyright= kn-copyright= en-aut-name=HayashiHidetaka en-aut-sei=Hayashi en-aut-mei=Hidetaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=IzumiShin-ya en-aut-sei=Izumi en-aut-mei=Shin-ya kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TariIsao en-aut-sei=Tari en-aut-mei=Isao 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=Deposition kn-keyword=Deposition en-keyword=Kinetics kn-keyword=Kinetics END start-ver=1.4 cd-journal=joma no-vol=140 cd-vols= no-issue=2 article-no= start-page=386 end-page=389 dt-received= dt-revised= dt-accepted= dt-pub-year=1993 dt-pub=19932 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Studies on the acid-base properties of the ZnBr2NaBr molten salt system en-subtitle= kn-subtitle= en-abstract= kn-abstract=The acid-base properties of the ZnBr2-NaBr melts at 623 K were investigated on the basis of the electromotive force measurements of a zinc-zinc concentration cell. The following two chemical equilibria were postulated to describe the acid-base character of the melts.
en-copyright= kn-copyright= en-aut-name=HayashiHidetaka en-aut-sei=Hayashi en-aut-mei=Hidetaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=UnoKiyofumi en-aut-sei=Uno en-aut-mei=Kiyofumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=TakeharaZen-ichiro en-aut-sei=Takehara en-aut-mei=Zen-ichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=KatagiriAkira en-aut-sei=Katagiri en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Kyoto University affil-num=3 en-affil= kn-affil=Kyoto University affil-num=4 en-affil= kn-affil=Kyoto University en-keyword=alcl3-nacl melts kn-keyword=alcl3-nacl melts en-keyword=equilibria kn-keyword=equilibria END start-ver=1.4 cd-journal=joma no-vol=34 cd-vols= no-issue=4 article-no= start-page=845 end-page=848 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200805 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Improvement of piezoresistance properties of silicon carbide ceramics through co-doping of aluminum nitride and nitrogen en-subtitle= kn-subtitle= en-abstract= kn-abstract=The piezoresistance coefficient was measured on co-doped silicon carbide ceramics. Evaluation samples of alpha-silicon carbide ceramics were first fabricated by glass capsule HIP method using powder mixture of silicon carbide and aluminum nitride with various ratios. The resultant aluminum nitride added silicon carbide ceramics were doped with nitrogen by changing the post-HIP nitrogen gas pressure. The lattice parameter increased with the amount of adding aluminum nitride indicating that the incorporated aluminum substituted smaller silicon atoms. After post-HIP treatment, lattice parameter then decreased with nitrogen gas pressure. The piezoresistive coefficient increased with the addition of aluminum nitride, it further increased with the nitrogen doping pressure. en-copyright= kn-copyright= en-aut-name=KishimotoAkira en-aut-sei=Kishimoto en-aut-mei=Akira kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OkadaYasuyuki en-aut-sei=Okada en-aut-mei=Yasuyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=HayashiHidetaka en-aut-sei=Hayashi en-aut-mei=Hidetaka kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University affil-num=2 en-affil= kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University affil-num=3 en-affil= kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University en-keyword=HIP kn-keyword=HIP en-keyword=co-doping kn-keyword=co-doping en-keyword=donor kn-keyword=donor en-keyword=acceptor kn-keyword=acceptor en-keyword=silicon carbide kn-keyword=silicon carbide en-keyword=strain sensor kn-keyword=strain sensor END