The kinetics of the thermal decomposition of Co3O4 has been examined in the 1123–1200 K temperature and 2.66–20.73 kPa oxygen pressure range. The kinetics of this process has
been deseribed in terms of a mixed-control model of reaction. The values of activation energies of diffusion and chemical
reaction as well as the observed activation energy have been given. The strong dependence of the decomposition rate on temperature
and oxygen pressure has been explained.