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Temperature dependence of ionic conductivity in (1 − x)ZrO2−(x − y)Sc2O3−yYb2O3 electrolyte material

✍ Scribed by Reiichi Chiba; Takao Ishii; Fumikatsu Yoshimura

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
462 KB
Volume
91
Category
Article
ISSN
0167-2738

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✦ Synopsis

The temperature dependence of the ionic conductivity of (1 -x)ZrO2-(x-y)Sc203-yYb203 (x = 0.07-0.15, y = 0.00-0.03) was examined to clarify the origins of the ionic conductivity decrease at low temperature. For y = 0.02-0.03 in this system, the cubic phase was stabilized at room temperature and discontinuity in the ionic conductivity disappears. The Arrhenius plots of the ionic conductivity for the stabilized samples were curved. The grain boundary resistance for (1 -x)ZrO2-(x-0.03)5c203-0.03Yb203 (x = 0.07-0.15) was separated from the total resistance with the AC impedance method. This allowed us to conclude that grain boundary resistance is not the cause of the curvature in the Arrhenius plots for this system.

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