FINITE-TIME THERMODYNAMICS OF A SCHOTTKY ANOMALY - THE MINIMAL GLASS-TRANSITION

被引:6
作者
SZWARC, H
机构
[1] Laboratoire de Chimie Physique des Matériaux Amorphes, URA D1104, CNRS, 91405 Orsay
关键词
D O I
10.1016/0022-3093(91)90312-T
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
It has been assumed that, for a glass transition to exist in a reorientationally disordered crystal, some symmetry departure must exist. This assumption has suggested a two-level model which depends on a symmetry departure parameter, DELTA-E, and whose behaviour can be described in terms of a population temperature analogous to a fictive temperature. This model reproduces characteristic properties of systems that vitrify, such as different behaviours at decreasing and increasing temperatures. It also allows the calculation of the heat capacity increment, DELTA-C(p,g), at the glass transition as a function of heat treatment. It is shown that DELTA-C(p,g) is not a monotonic function of DELTA-E and this could be a path towards the understanding of Angell's strong glasses.
引用
收藏
页码:252 / 254
页数:3
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