A study of the crystallization kinetics in Se₆₈Ge₂₂Pb₁₀ chalcogenide glass

Abstract

Differential scanning calorimetry (DSC) is performed at different heating rates under non-isothermal conditions to study the crystallization kinetics of Se₆₈Ge₂₂Pb₁₀ chalcogenide glass. Different kinetic parameters such as the activation energy of crystallization (<i style="">E_c</i>), the order parameter (<i style="">n</i>), the rate constant and its frequency factor have been determined. Four different non-isothermal methods Kissinger’s method, Matusita-Sakka theory, Augis-Bennett approximation and Ozawa-Chen method have been used in the present study. The average value of activation energy of crystallization <i style="">E_c</i> is 1.477 eV. The average value of Avrami’s index <i style="">n</i> is 3.61, which indicates that in the glassy Se₆₈Ge₂₂Pb₁₀, two crystallization (two- and three-dimensional growth) mechanisms are working simultaneously during its amorphous to crystalline transformation.