Evaluation of crystallization kinetics by means of DTA

M. D. Baró, N. Clavaguera, S. Bordas, M. T. Clavaguera-Mora, J. Casas-Vázquez

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19 Citations (Scopus)

Abstract

The kinetics of bulk crystallization of Se61.5Ge15 4Sb23.1 glasses was investigated from their thermal behaviour. In the thermal characterization of a glass the recrystallization temperature is highly dependent on both the rate of heating and the thermal history of the glass. Vitreous samples were prepared by quenching. From ratedependent curves it was found that the recrystallization process obeys first-order kinetics with an apparent activation enthalpy of 48±5 kcal/mole. Further analysis allows determination of both the activation enthalpy, H=90±4 kcal/mole, and the kinetic exponent of the Avrami equation, n=1.9±0.3. © 1977 Wiley Heyden Ltd., Chichester and Akadémiai Kiadó, Budapest.
Original languageEnglish
Pages (from-to)271-276
JournalJournal of Thermal Analysis
Volume11
DOIs
Publication statusPublished - 1 Apr 1977

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