The local structure of Sm-doped aluminosilicate glasses prepared by sol-gel method

被引：28
|
作者：
Jin, JS
Sakida, S
Yoko, T [1 ]
Nogami, M
机构：
[1] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan
[2] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2000年 / 262卷 / 1-3期
关键词：
D O I：
10.1016/S0022-3093(99)00696-1
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 local structures of Sm and Al in Sm-doped aluminosilicate glasses prepared by the sol-gel method were investigated by using Al-27 MAS NMR spectroscopy and X-ray radial distribution function (RDF) analysis. It is found that at low alumina content (1 mol%). the glass network consists of SiO4 and AlO6 structural units. At higher alumina content, AlO4 and AlO6 structural units coexist in the glasses. It is considered that the formation of AlO4 results in enhancement of the dispersion of Sm ions in these glasses. The average coordination number of Sm in a 10Al(2)O(3). 90SiO(2). 1Sm(2)O(3) glass slightly increased from 7.1 to 8.5 after heat-treatment in reducing atmosphere. The role of Al ions in dispersing Sm ions in a glass matrix is discussed. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：183 / 190
页数：8
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