Comments on “Kinetics of non-isothermal crystallization and glass transition phenomena in Ga10Se87Pb3 and Ga10Se84Pb6 chalcogenide glasses by DSC” by Al-Agel et al.

Abstract

A critical review of a recent paper by Al-Agel et al. (J. Non Cryst. Solids, 358 (2012) 564) on kinetics of non-isothermal crystallization and glass transition phenomena in Ga10Se87Pb3 and Ga10Se84Pb6 chalcogenide glasses is presented. A number of possible errors in procedures have been noticed. In particular, X-ray diffraction, Differential Scanning Calorimetry and Field Emission Scanning Electron Microscopy data may have been misinterpreted. Kinetic parameters deduced from data derived from the DSC results and using approaches developed by Kissinger, Ozawa and Matusita and others are discussed. Activation energies and Avrami exponents have been re-calculated from the experimental data presented by Al-Agel et al.