Examination of the kinetic reaction mechanisms of amorphous As50Se50 chalcogenide glass

The kinetic reactions mechanism of amorphous to crystalline transformation in the chalcogenide glasses of As50Se50 composition was investigated using differential scanning calorimetry (DSC) data measured under non-isothermal conditions at different heating rates (β = 5, 10, 20, 30 and 40 k min−1). The DSC data were analyzed using the integral g(χ) and differential f(χ) forms which describes the solid-state reactions mechanism utilizing the Ozawa approach. The crystallization activation energy of Ec(χ) was determined using the iso-conversional methods proposed by Friedman, Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose. The results revealed a slight increase of Ec(χ) with the conversion (χ). The results of g(χ), f(χ) and combination g(χ)f(χ) master plots showed that the As50Se50 chalcogenide glasses is a combination of two- and three-dimensional crystal growth.