The activation energy and the Avrami exponent for crystallization in a-Bi0.5Se99.5-xZnx glasses

被引：13
作者：
Khan, SA [1 ]
Zulfequar, M [1 ]
Husain, M [1 ]
机构：
[1] Jamia Millia Islamia, Dept Phys, New Delhi 110025, India
来源：
CURRENT APPLIED PHYSICS | 2003年 / 3卷 / 04期
关键词：
amorphous chalcogenide alloys; crystallization; activation energy; AMORPHOUS-CHALCOGENIDE ALLOY; STRUCTURAL RELAXATION; OPTICAL-PROPERTIES; METALLIC GLASSES; FILMS; TRANSITIONS; SYSTEM;
D O I：
10.1016/S1567-1739(03)00063-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The thermal stability of a-Bi0.5Se99.5-xZnx (x = 0, 0.1, 0.2, 0.5 and 1) glasses has been determined by an isothermal method. In this method, crystallization behavior has been studied by annealing the samples at higher temperature (between the glass transition and crystallization temperature). The glass transition and crystallization temperature were measured using differential scanning calorimeter (Model-DSC plus, Rheometric Scientific Company, UK). Annealing at higher temperature leads to the creation of crystalline phase. The activation energy of crystallization (DeltaE(c)) and order parameter (n) are calculated by fitting the values of the extent of crystallization (alpha) in the Avrami's equation. The temperature dependence of d.c. conductivity has also been measured for the study of the conduction mechanism in the same samples. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：337 / 343
页数：7
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