EFFECT OF MGO ADDITIONS ON THE GLASS-TRANSITION TEMPERATURE OF LI2O-AL2O3--SIO2 GLASSES

被引：4

作者：

COON, DN

NEILSON, RM

机构：

[1] EG&G Idaho Inc, ID, USA, EG&G Idaho Inc, ID, USA

来源：

JOURNAL OF MATERIALS SCIENCE LETTERS | 1988年 / 7卷 / 01期

关键词：

ALUMINOSILICATE GLASS - GLASS TRANSITION TEMPERATURE - MAGNESIA ADDITIVES;

D O I：

10.1007/BF01729907

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The objective of this communication is to propose that the glass transition temperature is related to atomic structure hence chemical composition in a systematic manner. The transition temperature is characterized by short-range atomic relaxations and signifies the beginning of the transformation range. Properties of the glass change from those of a solid to those of a supercooled liquid in the transformation range. The effects of MgO substitution for Li//2O were investigated in aluminosilicate glasses. Both Li** plus and Mg**2** plus exist in six-fold coordination with oxygen and are approximately the same size, 0. 06 and 0. 065 nm, respectively. The glasses were examined by differential thermal analysis to determine the glass transition temperature.

引用

页码：33 / 35

页数：3