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Kinetic parameters of crystallization in glassy Se100-xSbxalloys

✍ Scribed by Mehta, N. ;Zulfequar, M. ;Kumar, A.

Book ID
105363383
Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
207 KB
Volume
203
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Differential scanning calorimetry (DSC) has been performed at different heating rates under non‐isothermal conditions to study the crystallization kinetics of glassy Se~100–x~Sb~x~ (2 ≤ x ≤ 10) alloys. The crystallization kinetics have been studied using four different methods of analysis of the non‐isothermal DSC data and various kinetic parameters (the activation energy of crystallization, order parameter, rate constant and frequency factor) have been determined. The difference T~c~ – T~g~ (indicator of thermal stability) has been determined from the DSC thermograms for each sample. The rate constant K (indicator of the rate of amorphous to crystalline phase transformation) has been evaluated using the method of Augis and Bennett. The increasing sequence of the rate constant in the glasses studied is opposite to that of T~c~ – T~g~. This indicates that chalcogenide glasses having a higher rate of crystallization have less thermal stability. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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## Abstract The rate of crystallization in glassy Se~100–__x__~ Te~__x__~ (5 ≤ __x__ ≤ 30) and Se~100–__x__~ In~__x__~ (5 ≤ __x__ ≤ 30) alloys has been determined by using the Arrhenius dependence of the rate constant of crystallization. For this, the pre‐exponential factor __K__~0~ of the rate c