Thermal Analysis Of Specific Heat Of Silver Doped Se-In Glassy System

The present paper reports the detailed analysis of specific heat capacity (C-p) of glass transition (T-g), crystallization (T-c) and melting transition (T-m) appeared in Se90In8Ag2 chalcogenide glassy alloy. The value of C-p is calculated at onset, offset, peak and jump of the transitions. Enthalpy, thermal mass, thermal lag, and time lag are calculated for each transition and found that the jump in C-p increases for glass transition and decreases for crystallization whereas it is negligible in the melting transition as a function of heating rate. All transitions get wider and shallower as heating rate increases where T-g shows least variation in Delta T, Delta C-p, Delta H, and melting shows maximum variation whereas crystallization shows intermediate size of variations. Glass transition absorbs least heat energy and melting absorbs maximum whereas crystallization absorbs intermediate level of heat energy. The enthalpy of each transition decreases as heating rate increases. Time lag and temperature lag in the occurrence of each transition get smaller as heating rate increases and thermal mass of Se90In8Ag2 shows a decrease as heating rate increases. These results can be explained in terms of the order and dynamics of transitions.