On the structure of tungstate-tellurite glasses

被引：74

作者：

Sokolov, V. O. ^{[1
]}

Plotnichenko, V. G. ^{[1
]}

Koltashev, V. V. ^{[1
]}

Dianov, E. M. ^{[1
]}

机构：

[1] Russian Acad Sci, Fiber Opt Res Ctr, Moscow 119333, Russia

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2006年 / 352卷 / 52-54期

基金：

俄罗斯基础研究基金会;

关键词：

Ab initio; Raman spectroscopy; tellurites; structure;

D O I：

10.1016/j.jnoncrysol.2006.09.006

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：

A continuous network model of xWO(3)-(1 - x)TeO2 glasses is developed, based on quantum-chemical calculation and Raman spectra analysis, in order to relate the structural and vibrational properties with glass composition. The tungstate-tellurite glass network is shown to be formed mainly by structural units of three types, TeO4 trigonal bipyramids, O=TeO2 trigonal pyramids, and WO6 octahedra with O=W double bonds. Most of the W atoms are found to be incorporated into single O=WO5 octahedra, with no more than several percents of these atoms occurring in 2[O=WO5] Paired tungstate centers. The structural and vibrational properties of tungstate-tellurite glasses of several compositions are analyzed by application of the model and a novel interpretation of the Raman spectra is suggested. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：5618 / 5632

页数：15

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