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Thermal Characterization of Se80-xTe20Inx Glasses Using Iso-Conversional Methods

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DOI: 10.4236/jcpt.2012.22009    3,531 Downloads   6,991 Views   Citations

ABSTRACT

Alloys of Se80-xTe20Inx glassy system are obtained by quenching technique and crystallization kinetics has been studied using Differential Scanning Calorimetric [DSC] technique. Well defined endothermic and exothermic peaks are ob- served at glass transition temperature (Tg) and crystallization temperature (Tc). From DSC scans, Tc is obtained at dif- ferent heating rates (5, 10, 15, 20, 25 K/min). It is observed that Tc increases with increasing heating rate for a particular glassy alloy. Activation energy of crystallization (Ec) has been calculated by different Non-isothermal Iso-conversional methods, i.e., Kissinger-Akahira-Sunose [KAS], Friedman, Flynn-wall-Ozawa [FWO], Friedman-Ozawa [FO] and Sta-rink methods. It is observed that Ec is dependent on extent of crystallization (α). Activation energy is also found to vary with atomic percentage of In in ternary Se80-xTe20Inx glassy system. The compositional dependence of Ec shows a re-versal in the trend at x = 15 in Se80-xTe20Inx, which is explained in terms of mechanically stabilized structure at this composition.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

R. Shukla, P. Agarwal and A. Kumar, "Thermal Characterization of Se80-xTe20Inx Glasses Using Iso-Conversional Methods," Journal of Crystallization Process and Technology, Vol. 2 No. 2, 2012, pp. 64-71. doi: 10.4236/jcpt.2012.22009.

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