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Calorimetric study of crystallization kinetics in ternary alloys of Se–Te–Sn glasses using iso-conversional approach

Rafiullah Ansari, Horesh Kumar

Boletín de la Sociedad Española de Cerámica y Vidrio · 2020

doi:10.1016/j.bsecv.2020.01.002 (opens in a new tab)

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Abstract

Iso-conversional study is the model free approach which is applied to the crystallization kinetics, to estimate kinetic parameters of crystallization at a given conversion fraction (α). In this paper, we have applied two important Iso-conversional methods namely Kissinger–Akahira–Sunose (KAS) method and Friedman to study the variation of activation energy Ec and Avrami exponent, n, with the conversion fraction (α). These methods showed that the activation energy of crystallization is not constant but varies with the degree of conversion which suggests that the examined glasses follow multi-step kinetics during thermally activated crystallization. Resumen: El estudio de isoconversión es el enfoque sin modelo que se aplica a la cristalización. cinética, para estimar los parámetros cinéticos de cristalización en una fracción de conversión dada (α). En este artículo, hemos aplicado dos métodos importantes de conversión iso: Método Kissinger – Akahira – Sunose (KAS) y Friedman para estudiar la variación de la activación Energía Ec y exponente de Avrami, n, con la fracción de conversión (α). Estos métodos demostró que la energía de activación de la cristalización no es constante sino que varía con el grado de conversión que sugiere que las gafas examinadas siguen una cinética de varios pasos durante la cristalización activada térmicamente.

Abstract licence: CC BY-NC-ND

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