Abstract
Abstract In order to clarify the mixing effect of cation on the electrical conductivity and the hydration, the electrical conductivity of La0.9Sr0.1(Yb1 − xMx)O3 − δ (M = In, Y) has been determined by the four-probe AC technique in the temperature range of 673–1173 K. The proton concentration was estimated from the change in weight due to hydration by a thermogravimetric analysis. The conductivity and proton concentration increased with the increase in the In3 + content on the Yb-site. On the other hand, the electrical conductivity and protonic concentration of La0.9Sr0.1(Yb1 − xYx)O3 − δ showed minimum values at x = 0.5.
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