Formation and properties of sodium tantalum silicate glasses

被引：0
|
作者：
Conzone, Samuel D. [1 ]
Shelby, James E. [1 ]
机构：
[1] Alfred Univ, Sch Engn, Alfred, NY 14802 USA
来源：
PHYSICS AND CHEMISTRY OF GLASSES-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART B | 2006年 / 47卷 / 03期
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D O I：
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A large glass forming region exists in the sodium tantalum silicate system. Addition of Ta2O5 to sodium silicate glasses results in a large increase in density, refractive index, and glass transformation temperature and a decrease in the thermal expansion coefficient. Properties of sodium tantalum silicate glasses are compared with those of the corresponding sodium niobium silicate glasses, which exhibit similar property/composition trends. A speculative model, which assumes that Ta5+ ions are octahedrally coordinated by oxygens, is proposed for the structure of these glasses.
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页码：283 / 287
页数：5
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