Crystallization kinetics and Avrami index of Sb-doped Se–Te–Sn chalcogenide glasses

Abstract

ABSTRACTBulk amorphous samples of Sb-substituted Se78−xTe20Sn2Sbx (0 < x < 6) have been prepared using melt quench technique. The structure of Se78−xTe20Sn2Sbx (x = 0, 2, 4, 6) glassy alloys has been investigated using X-ray diffraction technique. Calorimetric studies of the prepared samples have been performed under non-isothermal conditions using differential scanning calorimetry (DSC) and glass transition temperature as well as crystallization temperature has been evaluated using DSC scans. The activation energy of crystallization kinetics (Ec) has been determined using model-free approaches such as Kissinger, Ozawa, Tang and Starink methods. The Avrami index (n) and frequency factor (Ko) have been calculated by Matusita and Augis–Benett method.