VITREOUS BORATE NETWORKS CONTAINING SUPERSTRUCTURAL UNITS - A CHALLENGE TO THE RANDOM NETWORK THEORY

被引：49

作者：

WRIGHT, AC ^{[1
]}

VEDISHCHEVA, NM ^{[1
]}

SHAKHMATKIN, BA ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI, INST SILICATE CHEM, ST PETERSBURG 199155, RUSSIA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 193卷

关键词：

D O I：

10.1016/0022-3093(95)00432-7

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：

Borate glasses are an enigma in that there is now increasing evidence that their structures are dominated by superstructural units. Crystallographic data for a wide range of crystalline borates are used as a basis to propose a set of criteria for the formation of vitreous borate networks, taking into account the topological degrees of freedom necessary for conventional glass formation and using the PbO-B2O3 system as an example. It is concluded that random network models of vitreous B2O3 containing large numbers of boroxol groups can be built with the correct density if they contain locally independent interpenetrating networks.

引用

页码：92 / 97

页数：6

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