Kinetic phenomena in non-crystalline materials studied by thermal analysis

被引：11

作者：

Málek, J

Pustková, P

Shánelová, J

机构：

[1] Univ Pardubice, Fac Chem Technol, Dept Chem Phys, Pardubice 53210, Czech Republic

[2] Univ Pardubice, Fac Chem Technol, Dept Inorgan Technol, Pardubice 53210, Czech Republic

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2003年 / 72卷 / 01期

关键词：

chalcogenide glasses; crystallization; glass transition; kinetic models; structural relaxation; viscosity;

D O I：

10.1023/A:1023900610216

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The structural relaxation and viscosity behavior of Ge38S62 glass has been studied by thermomechanical analysis. The relaxation response to any thermal history is well described by the Tool-Naraynaswamy-Moynihan model. The apparent activation energy of structural relaxation is very close to the activation energy of viscous flow (Eeta=478+/-12 kJ mol(-1)). However, the activation energy of crystal growth obtained by optical microscopy is about one half of this value. Similar result has been obtained from isothermal DSC measurement (E-a=220+/-20 kJ mol(-1)). The kinetic analysis of these data reveals interface controlled crystal growth with zero nucleation rate.

引用

页码：289 / 297

页数：9

共 23 条

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