Journal of Applied Physical Science International

Glassy alloys of Se₉₀In_10-xAg_x were prepared using quenching technique. Differential scanning calorimetric is performed for Se₉₀In_10-xAg_x (x = 0, 2, 4, 6, 8 at. %) glasses under non-isothermal conditions at different heating rates (5, 10, 15, 20 K/min) for the thermal study. Well defined endothermic and exothermic peaks are obtained at glass transition (T_g) and crystallization temperature (T_c) respectively, which indicates that these glasses are in single phase. The dependence of glass transition temperature on the heating rate β has been studied. Calculation for the value of (T_c002D T_g) is done and the value of stability parameter S for each glassy alloy have been reported. Moynihan and Kissinger models are used for evaluating the activation energy of glass transition (E_g). Results found using these methods are in good agreement with each other. Composition dependence of these parameters is discussed in terms of average co-ordination number which shows a discontinuity at 6 at. % of Ag.