Crystallization kinetics of glassy Se-Te-Sn alloys

The present article deals with the differential thermal analyses (DTA) study of Se-Te glasses containing Sn. DTA runs are taken at six different heating rates (5, 10, 15, 18, 20, and 22 K min^-1). The crystallization data are examined in terms of modified Kissinger, Mahadevan method, and Augis and Bennett approximation for the non-isothermal crystallization. Results of DTA under non-isothermal conditions on the glasses of the Se₈₀Te_20-xSn_x (x = 3 and 9) are reported and discussed at different heating rates. The glass transition temperatures (T_g), the onset crystallization temperatures (T_c), and the peak temperature of crystallization (T_p) were found to be dependent on the compositions and the heating rates. From the dependence on heating rates of (T_g) and (T_p) the activation energy for glass transition (E_g) and the activation energy for crystallization (E_c) are calculated and their composition dependence discussed. (author)