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

• We have synthesized new binary glass Se98Zn2.
• Advanced iso-conversional method is used for analysis of DSC data.
• Effect of incorporation of Zn is studied on crystallization of selenium.

The crystallization kinetics of glassy Se (g-Se) and glassy Se98Zn2 alloy has been studied by means of differential scanning calorimetric (DSC) technique. Iso-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 Tα, activation energy of crystallization Eα) of crystallization process in non-isothermal mode. The monotonous decrement in activation energy, Eα with the extent of conversion, α confirms the complex kinetic mechanism of g-Se and Se98Zn2 alloy. The reaction model, ‘Avrami–Erofeev’ g(α)=[−ln(1−α)]1/n has been followed to describe the crystallization process with n=1.5 for g-Se and n=2.0 for Se98Zn2 alloy.

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