Investigation of Crystallization Kinetics in Glassy Se and Binary Se₉₈M₂ (M=Ag, Cd, Zn) Alloys Using DSC Technique in Non-Isothermal Mode

Chandrabhan Dohare, Neeraj Mehta

Department of Physics, Glass Science Laboratory, Banaras Hindu University, Varanasi, India.

DOI: 10.4236/jcpt.2012.24025                

Abstract

The crystallization kinetics of glassy Se and binary Se₉₈M₂ (M=Ag, Cd, Zn) alloys have been studied at different heating rates (5, 10, 15, 20 Kmin^-1) using Differential Scanning Calorimetric (DSC) technique. The crystallization temperature (T_c) is determined from exothermic peak obtained in DSC scans of present samples. The variation in peak crystallization temperature (T_c) with the heating rate (β) has been used to investigate the growth kinetics using Kissinger, Augis-Bennet and Matusita-Sakka models. The activation energy of crystallization (E_c) has been found to increase with Ag additive and to decrease with Zn and Cd additive. The value of various kinetic parameters such as rate constant (K_p), Avrami index (n), thermal stability (S) and Hruby number (H_r) have been calculated under non-isothermal mode. The maximum change in different kinetic parameters has been found after the incorporation of Ag additive.

Keywords

Differential Scanning Calorimetry; Crystallization Kinetics; Chalcogenide Glasses

Conflicts of Interest

The authors declare no conflicts of interest.

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