INITIAL SINTERING KINETICS OF LITHIUM META TITANATE AT CONSTANT RATES OF HEATING

In order to evaluate the sintering behavior of lithium meta titanate (Li۲TiO۳) powder, the shrinkage of powder compact was measured under constant rates of heating. Densification curves for Li۲TiO۳ have been constructed with the help of shrinkage powder measured at different heating rates. The activation energy at the initial stage of sintering was determined by analyzing the densification curves and the value of Q=۳۷۷ kJ/mol was obtained. The diffusion mechanism at the initial sintering stage was determined by the analytical method applied to the constant rates of heating data. This analysis exhibited that the dominant mechanism for initial sintering stage of Li۲TiO۳ is volume diffusion from grain boundary and surfaces.