Abstract
Compositional dependence of ionic conductivity in the system ZrO 2–Y 2O 3–Yb 2O 3 was investigated in the temperature range 573–873 K using the complex impedance technique. It was shown that the conductivity decreases with increasing concentration of Yb 2O 3 in the system ZrO 2–Y 2O 3–Yb 2O 3. Analyzing the experimental data according to the classic Arrhenius equation showed that such an experimental phenomenon can be attributed to the tighter association between Yb 3+ and oxygen vacancy, compared with that between Y 3+ and oxygen vacancy, which hinders the migration of oxygen vacancy in the materials.
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