Kinetic analysis of the α-β HgI2 phase transition -: Using isothermal and non-isothermal DSC

被引：3
|
作者：
Daviti, M
Chrissafis, K
Paraskevopoulos, KM [1 ]
Polychroniadis, EK
Spassov, T
机构：
[1] Aristotle Univ Thessaloniki, Dept Phys, GR-54124 Thessaloniki, Greece
[2] Univ Sofia, Fac Chem, BU-1126 Sofia, Bulgaria
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2002年 / 70卷 / 02期
关键词：
activation energy; DSC; HgI2; kinetics; phase transition;
D O I：
10.1023/A:1021653313830
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The kinetics of the alpha-beta phase transition of HgI2 were investigated by isothermal and non-isothermal differential scanning calorimetry. The effective activation energy of the transition, 415 +/- 40 kJ mol(-1), was determined applying the methods of Kissinger and Ozawa. The transition kinetics were described by the Johnson-Mehl-Avrami model and the value of the Avrami exponent n was found to range from high values (n>3) at the early stages to lower values at later stages of the transformation, with an average value of 2.
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收藏
页码：605 / 614
页数：10
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