Crystallization kinetics of a-Se75Te25 − xGax (x = 0, 5, 10 and 15 at wt %) glassy system

Bulk glasses of a-Se75Te25 − xGax (x = 0, 5, 10 and 15 at wt %) have been prepared by melt quenching technique. These samples were structurally characterized by using X-ray diffraction. Kinetic of crystallization in these glasses was studied under non-isothermal conditions using differential thermal analysis (DTA). DTA is performed at different heating rates of 5, 10, 15, 20 and 30 °C/min. The values of glass transition (Tg) and crystallization peak temperature (Tp) are found to be composition and heating-rate dependent. The obtained results have been analyzed in terms of activation energy of glass transition (Eg) using Kissingerʹs and Mahadevan et al. relations. Values of Eg obtained by the two relations are in agreement with each other. The results indicate that the crystallization process is a three-dimensional growth.