Cation Diffusion, Point Defects and Reaction in the CoO-ß-Ga2O3 System
The kinetics of a solid state reaction between two oxides AO and B2O3 (A, B = cations in the oxidation state +2, +3 resp.),which may form the compound AB2O4, can be influenced by the mutual solu-bility of the reactants as stated by Pelton, Schmalzried and Greskovich (1). Therefore we have to distinguish between so-called reactions of the first and second kind (2); reactions of the first kind take place between pure oxides AO and B2O3, while reactions of the second kind occur between the phase AO, presaturated with B2O3, and the phase B2O3, presaturated with AO.
KeywordsPoint Defect Spinel Phase Interdiffusion Coefficient Tracer Diffusion Pure Oxide
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