Chemical Diffusion in CoO

Authors: Janusz Nowotny Andrzej Sadowski

Publish Date: 1985

Volume: , Issue: , Pages: 227-242

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Abstract

The available experimental data for the chemical diffusion in CoO1–12 can be grouped according to the reported dependence of tilde D on P O 2 and the slope of log tilde D vs 1/T Table I The character of the dependence of tilde D vs P O 2 is important for understanding the nature of interactions between diffusing defects When defects form an ideal solution in the lattice with neglegible interactions i e undoped NiO13 then tilde D should be essentially independent of defect concentration and P O 2 This type of behavior has been reported for CoO by Mrowec et al4 Wimmer et al5 Chadzhieva et al8 and Chowdhry and Coble9 However Morin and Dieckmann610 and PetotErvas et all12 have observed changes in tilde D with P O 2 which are consistent with strong interactions between defects in CoO715–17

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