Thermal Properties of Se_100–xZn_x Glassy System

Mohd Nasir, Mohd Abdul Majeed Khan, Mushahid Husain, Mohammad Zulfequar

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DOI: 10.4236/msa.2011.25038                

Abstract

The crystallization process in Se_100–xZn_x glassy system is investigated using differential scanning calorimeters (DSC). The samples are prepared by conventional melt-quenching technique in the composition range 2 ≤ x ≤ 20 (at%). Non-isothermal measurements are carried out for different heating rates .The value of the glass transition temperature T_g the crystallization temperature T_c and the crystallization peak temperature T_p, are found to be depending upon both heating rate as well as the composition from thermal analytical data. The investigation of crystallization kinetics indicates a single stage crystallization process. The glass transition energy E_g and the crystallization activation energy E_c are also evaluated from thermal analytical data. The analyzer has been used the most reliable non-isothermal kinetic methods. The value of kinetics parameters E_g, E_c and ‘n’ are calculated using non-isothermal kinetics methods. The analysis shows that the incorporation of Zinc content has a strong influence on the crystallization mechanism for the Se_100–xZn_x glassy system.

Keywords

Chalcogenide Glasses, Amorphous, Crystallization Kinetics, DSC, Non-Isothermal

Conflicts of Interest

The authors declare no conflicts of interest.

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