Crystallization kinetics of glassy Se-Te-Sn alloys

Abstract

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 Se 80 Te 20- - x Sn 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.