Composition dependence of the activation energy of the glass transition in some chalcogenide glasses

Abstract

The activation energy (Et) of the glass transition process has been obtained for glassy Se80-xTe20Mx (M = Ag, Cd, In, Sb) and Se100-xMx (M = In, Te, Sb) systems using differential scanning calorimetry. The composition dependence of Et is explained in terms of fragility index for the systems. A reversal in the trend of the Et is explained using topological models.