High strengths and densities of carbon activated chromic oxide had been observed by Stone66 in a general study of the effect of admixed reducing agents, particularly carbon, on the sintering of chromic oxide. The present work was undertaken to elucidate the mechanism, to which this enhanced sintering rate could be attributed. A survey of the literature outlines present theories and mechanisms relevant to sintering processes, while solid and liquid state sintering have been discussed with their particular application and limitation to the present system. Control of the dependant variables in the sintering process was utilised to define the mechanism of the activated sintering. Confirmation of the diffusion coefficients obtained from this kinetic data was sought utilising tracer techniques in the case of the chromium ion diffusion in the oxide.