Oxygen Diffusion in Powder and Polycrystal of Advanced Metal Oxides

Abstract

The methods to determine oxygen diffusion coefficients in powder, sintered body, and single crystal of metal oxides were summarized and their characteristics were also described. In particular, it was demonstrated that if powder specimens were used, near-surface diffusion coefficient could be obtained in addition to lattice diffusion coefficient. Typical results of diffusion experiments were presented. Finally the summaries of diffusion coefficients in yttrium oxide, nickel oxide, cerium oxide, indium oxide, and mullite were shown.