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

Abstract Bulk glasses of a-Se 75 Te 25 − x Ga x ( 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 ( T g ) and crystallization peak temperature ( T p ) are found to be composition and heating-rate dependent. The obtained results have been analyzed in terms of activation energy of glass transition ( E g ) using Kissinger's and Mahadevan et al. relations. Values of E g obtained by the two relations are in agreement with each other. The results indicate that the crystallization process is a three-dimensional growth.