Induction Period for Oxygen Permeation through Calcia‐Stabilized Zirconia Ceramic

Abstract

Chemical diffusion of oxygen in calcia‐stabilized zirconia, with impurities of A12O3, SiO2, MgO, Fe2O3, and TiO2, was studied by the non‐steady‐state permeation technique at 960° to 1450°C. The apparent chemical diffusion coefficient, D, was found to decrease with increasing content of Fe2O3, and with decreasing oxygen pressure. The results were consistent with a trapping mechanism involving free and trapped electron holes or with partial control by surface processes.