Abstract
Structural relaxation of isothermally and iscochronally heat treated Ge1−xSnxSe2.5 (x = 0.3, 0.5) glassy alloys have been studied using a differential scanning calorimeter under non‐isothermal conditions. Relaxation enthalpies in the vicinity of glass transition have been recorded on the basis of heat capacity curves of annealed and unannealed samples. Besides relaxation enthalpy, activation energy of structural relaxation for both annealed and unannealed samples have been determined using Kissinger formalism. The results predict that sub‐Tg annealing of glass leads to decrease in enthalpy of system thereby taking it to more equilibrium configuration. It is also observed that activation energy of structural relaxation is lower for annealed sample than unannealed sample and therefore glass transition occurs at a lower temperature.
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