Hydrogen Gas Sensing of High Electrical Conducting-P2O5-SiO2 Glasses Prepared by Sol-Gel Process |
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| Authors: | Hiromi Matsushita Ritsuko Nagao Masayuki Nogami Toshihiro Kasuga Tomokatsu Hayakawa |
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| Institution: | (1) Department of Materials Science and Engineering, Nagoya Institute of Technology, Showa Nagoya, 466-8555, Japan;(2) Department of Materials Science and Engineering, Nagoya Institute of Technology, Showa Nagoya, 466-8555, Japan |
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| Abstract: | High proton-conducting P2O5-SiO2 glass was applied to the electrolyte of the hydrogen concentration cell for hydrogen gas sensing. 5P2O5·95SiO2 glass was prepared using the sol-gel method and its electrical conductivity and electromotive force were measured at 50°C as a function of both the ambient humidity and hydrogen gas concentration. The electrical conductivities increased with increasing humidity and reached  10–2 S/cm at 90% relative humidity. The electromotive force of the hydrogen concentration cell, where the glass was used as a membrane, showed good Nernstian response to hydrogen pressure in the high relative humidity region. |
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| Keywords: | proton conductor phosphate glass sol-gel hydrogen concentration cell |
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