Kinetic phenomena in non-crystalline materials studied by thermal analysis

被引：0

作者：

J. Málek

P. Pustková

J. Sháněová

机构：

[1] University of Pardubice,Department of Physical Chemistry, Joint Laboratory of Solid State Chemistry Nám. Čs

[2] Faculty of Chemical Technology,Department of Inorganic Technology, Nám. Čs. Legií

[3] University of Pardubice,undefined

[4] Faculty of Chemical Technology,undefined

来源：

Journal of Thermal Analysis and Calorimetry | 2003年 / 72卷

关键词：

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

D O I：

暂无

中图分类号：

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 (Eη=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 (Ea=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：8

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