MAS NMR-STUDIES OF TERNARY SILICATE-GLASSES

被引:5
作者
PRABAKAR, S [1 ]
RAO, KJ [1 ]
机构
[1] INDIAN INST SCI,SOLID STATE & STRUCT CHEM UNIT,BANGALORE 560012,KARNATAKA,INDIA
来源
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1991年 / 64卷 / 04期
关键词
D O I
10.1080/13642819108215265
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of silicate glasses based on PbO-B2O3-SiO2, PbO-Al2O3-SiO2, Bi2O3-Al2O3-SiO2 and PbO-PbF2-SiO2 have been studied using solid-state magic-angle-spinning (MAS) NMR of Si-29, Al-27 and B-11 nuclei. Al is found to be always four-coordinated in all these glasses. Si is present mostly as Q2 or Q3. Four-coordinated boron dominates the B-11 spectra. Calculated partial charges on Al, Si and B have been used to provide a rationale for the observed spectral features.
引用
收藏
页码:401 / 411
页数:11
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