Oxygen permeability of calcia-stabilized zirconia |
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Authors: | Masanori Iwase Toshisada Mori |
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Affiliation: | 1. Department of Metallurgy, USA 2. Kyoto University, 606, Sakyo-ku, Kyoto, Japan
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Abstract: | Oxygen permeability of commercial calcia-stabilized zirconia has been measured at 1673 to 1823 K by the following cell; O2 ZrO2(CaO) N2 - O2 (P’tO2 = 1 atm) solid electrolyte (P″O2 = 0.39 - 1010-3 atm). Oxygen permeability of calcia-stabilized zirconia is proportional to (1 - P″O2 1/4). From the permeability measurement, the conduction properties of the electrolyte were log σ-? b+ = 0.28- 5100/T and logPb+ =-0.87 + 15,400/T where σ-? b+ is the þ-@#@ type electronic conductivity at PO 2 = 1 atm, and Pb+ is the oxygen activity at which the þ-@#@ type electronic conductivity and the ionic conductivity are equal. |
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