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- W2332183695 abstract "The electromotive force (EMF) of an oxygen concentration cell using SiO2-Al2O3 ceramics (x=1, 2, 3 and 4 in xAl2O3⋅2SiO2) as a solid electrolyte was measured at 1073-1573K in the oxygen pressure range of 1.0×10-1.0 to 1.0×103.5Pa at the anode side. The SiO2-Al2O3 ceramics (96.2-98.5% of theoretical density) sintered at 1873-1903K in air were annealed at 1673K for 8h to produce equilibrium phases before EMF measurement. Air as a reference gas and Ar-O2 mixed gas were introduced to cathode and anode sides, respectively. The measured EMF indicates that ionic transport number (ti) of oxygen is higher in the following order: mullite-SiO2 composite (x=1, 2)>mullite (x=3)>mullite-Al2O3 composite (x=4). At lower oxygen pressures, ti decreased with decreasing oxygen pressure due to formation of electrons available for conduction. The critical oxygen pressure for ti≈1 was 101.8 to 102.7Pa for x=1, 2. The concentration of electrons formed increased in proportional to PO2-1/4 at 1473-1573K, and PO2-1/6 at 1073K." @default.
- W2332183695 created "2016-06-24" @default.
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- W2332183695 date "1994-01-01" @default.
- W2332183695 modified "2023-10-16" @default.
- W2332183695 title "Composition Dependence of Electromotive Force of Silica-Alumina Ceramics as Oxygen Solid Electrolyte" @default.
- W2332183695 cites W1151288568 @default.
- W2332183695 doi "https://doi.org/10.2109/jcersj.102.241" @default.
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