ON THE THERMALLY ACTIVATED STRUCTURAL RELAXATION IN GLASSES

被引：22

作者：

BONNET, JP

机构：

[1] Laboratoire de Science des Matériaux Vitreux, URA CNRS 1119, Université Montpellier II, 34095 Montpellier Cedex 5, Sciences and Techniques du Languedoc

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1991年 / 127卷 / 02期

关键词：

D O I：

10.1016/0022-3093(91)90147-X

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The asymmetric double-well potential model for thermally activated structural relaxation of Gilroy and Phillips is re-examined. Analytical expressions for the attenuation and the velocity variation of acoustic waves, valid on a large range of temperature and frequency, are found. An application to a-SiO2 shows that this model using a constant distribution of asymmetries is no longer valid for T greater-than-or-similar-to 150 K. A refinement of the model is obtained by considering a Gaussian distribution of asymmetries. Good agreement is obtained in fitting ultrasonic results.

引用

页码：227 / 231

页数：5

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