Gaussian Analysis of Glass Transition Peak of Ag Doped SeIn Glassy Alloy

This study reports Gaussian analysis of glass transition peak appeared in silver doped SeIn amorphous glassy alloy. The Se90In8Ag2 was heated at different heating rates from 10 degrees C/min to 25 degrees C/min using calorimetric technique and observed an endothermic peak for the glass transition (T-g). The shape, size, position and behavior of the peak changes as the heating rate changes. A detailed peak analysis is performed following Gaussian model for this transition to show the significance of the shape and size of the transition. The sample absorbs more heat energy when heating rate increases, and shows an increase in enthalpy, decrease in entropy and the presence of a positive Gibbs free energy. This indicates that the glass transition is nonspontaneous transition and needs more thermal energy to go through the transition during heating. The SeInAg has short ranged ring chain molecular structure. As it is heated, this molecular arrangement gets flexible and goes to the rubbery state at T-g. The mobility of the molecular arrangement increases with temperature increase and T-g shifts towards higher temperature as heating rate increases following Gaussian behavior.