Study of zinc incorporation on the non-isothermal crystallization in glassy selenium using iso-conversional approach

The crystallization kinetics of glassy Se (g-Se) and glassy Se98Zn2 alloy has been studied by means of differential scanning calorimetric (DSC) technique. lso-conversional methods [Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), Tang and Straink] were used to determine the various kinetic parameters (i.e. crystallization temperature T-alpha, activation energy of crystallization E-alpha) of crystallization process in non-isothermal mode. The monotonous decrement in activation energy, E-alpha with the extent of conversion, a confirms the complex kinetic mechanism of g-Se and Se98Zn2 alloy. The reaction model, 'Avrami-Erofeev' g(alpha)=[- ln(1 - alpha)](1/n) has been followed to describe the crystallization process with n=1.5 for g-Se and n=2.0 for Se98Zn2 alloy. (C) 2014 Elsevier B.V. All rights reserved,