Effect of chemical composition on viscosity of oxide glasses

被引：50

作者：

Avramov, I ^{[1
]}

Rüssel, C ^{[1
]}

Keding, R ^{[1
]}

机构：

[1] Univ Jena, Otto Schott Inst, D-07743 Jena, Germany

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2003年 / 324卷 / 1-2期

关键词：

D O I：

10.1016/S0022-3093(03)00230-8

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 dependence of viscosity on composition of silicate melts is described by means of a structure based model. It distinguishes between network forming oxides, such as SiO2, and network modifying ones, such as Na2O. The structural assumption is that there are two different types of bonds in the system: rigid ones like Si-O-Si and floppy bonds like Si-O-Na-divided by. The activation energy for shear viscosity is reduced in the presence of floppy bonds. Therefore, even low concentrations of modifying oxides reduce considerably the viscosity of the melt, a lubricant effect. (C) 2003 Published by Elsevier B.V.

引用

页码：29 / 35

页数：7

共 18 条

[1] Crystallization kinetics and rigidity percolation in glass-forming melts [J].