Diffusivity of Oxide Ion in LaGaO3 Perovskite Oxide

Abstract

Oxygen diffusivity in perovskite oxide was introduced based on oxygen tracer diffusion constant. The high oxide ion conductivity in LaGaO3 based oxide was explained by high mobility of vacancy. Although electrical conductivity increased with increasing dopant amount, mobility of vacancy estimated by oxygen self diffusion decreases with increasing dopant amount, which could be explained by the formation of dopant and vacancy cluster. Difference in oxygen diffusion in fluoride and perovskite oxide was also introduced.