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Phosphosilicate Gels as a Solid State Proton Conductor at Medium Temperature and Low Humidity
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| Title: | Phosphosilicate Gels as a Solid State Proton Conductor at Medium Temperature and Low Humidity |
| Other Titles: | 中温低湿度におけるプロトン伝導性固体としてのホスホシリケートゲル |
| Authors: | MATSUDA, Atsunori1 Browse this author | | KANZAKI, Takao2 Browse this author | | TADANAGA, Kiyoharu3 Browse this author →KAKEN DB | | TATSUMISAGO, Masahiro4 Browse this author | | MINAMI, Tsutomu5 Browse this author |
| Authors(alt): | 松田, 厚範1 | | 勘崎, 廷夫2 | | 忠永, 清治3 | | 辰巳砂, 昌弘4 | | 南, 努5 |
| Keywords: | Proton conduction | | Phosphosilicate gel | | Phosphoric acid | | Medium temperature range | | Low humidity |
| Issue Date: | 1-Feb-2002 |
| Publisher: | Ceramic Society of Japan |
| Journal Title: | Journal of the Ceramic Society of Japan |
| Journal Title(alt): | 日本セラミックス協会学術論文誌 |
| Volume: | 110 |
| Issue: | 1278 |
| Start Page: | 131 |
| End Page: | 134 |
| Publisher DOI: | 10.2109/jcersj.110.131 |
| Abstract: | Phosphosilicate (P2O5-SiO2) gels with a P/Si molar ratio of 1.0 heat-treated at 150°C were found to retain a high conductivity of 1.5×10-2S·cm-1 even after holding at a temperature of 130°C at a relative humidity of 0.7% for about 400 min. On the other hand, the conductivity of the porous silica gels impregnated with 5M H3PO4 largely decreased from 1×10-2 to 6×10-6S·cm-1 during holding under the same conditions for about 400 min. The difference in the changes of conductivities between phosphosilicate gels and H3PO4-impregnated porous silica gels with holding time indicates that the former can retain larger amounts of adsorbed water at 130°C than the latter. Condensed structural units with Si-O-P-OH groups in the phosphosilicate gels are expected to enhance the retention of the adsorbed water in the gels aiid improve the proton conductivity even at relatively high temperatures and low humidity conditions. |
| Rights: | https://creativecommons.org/licenses/by-nd/4.0/deed.ja |
| Type: | article |
| URI: | http://hdl.handle.net/2115/73943 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 忠永 清治
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