Kinetic Study of Non-Isothermal Crystallization in Se_90-xZn₁₀Sb_x (x = 0, 2, 4, 6) Chalcogenide Glasses

Lamia Heireche, Mohamed Heireche, Maamar Belhadji

Physics Department, Faculty of Science, Oran University, Oran, Algeria.

DOI: 10.4236/jcpt.2014.42014                

Abstract

Crystallization and glass transition kinetics of Se_90-xZn₁₀Sb_x (x = 0, 2, 4, 6) chalcogenide glasses prepared by conventional melt-quenching technique were studied under non-isothermal condition using a differential scanning Calorimeter (DSC) measurement at different heating rates 5, 7, 10 and 12°C/min. The glass transition temperatures T_g, the crystallization temperatures T_c and the peak temperatures of crystallization T_p were found to be dependent on the compositions and the heating rates. From the dependence on the heating rates of T_g and T_p, the activation energy for glass transition, E_g, and the activation energy for crystallization, E_c, are calculated and their composition dependence is discussed. The activation energy of glass transition E_g, Avrami index n, dimensionality of growth m and activation energy of crystallization E_c have been determined from different models.

Keywords

Crystallization Kinetics, Chalcogenide Glasses, Crystallization Temperature, Activation Energy, Differential Scanning Calorimetry

Conflicts of Interest

The authors declare no conflicts of interest.

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