Oxygen Diffusion in Chevrel Phase Compounds

Abstract

Oxygen amount incorporated into Cupper chevrel phase sulfides Cu₂Mo₆S_7.8 powder was monitored by TG. Using a kind of relaxation method, the chemical diffusion coefficients of oxygen in Cu₂Mo₆S_7.8 was caluculated by the weight change of the specimen. The chemical diffusion coefficients of oxygen was 10^-13-10^-16cm²/s over the temperature range of 200-300°C and activation energy of diffusion was 157kJ/mol.