Structure and properties of x SnO-(100-x)P2O5 glasses

被引：21

作者：

Bekaert, T ^{[1
]}

Montagne, L ^{[1
]}

Delevoye, L ^{[1
]}

Palavit, G ^{[1
]}

Revel, B ^{[1
]}

机构：

[1] ENSCL, Lab Cristallochim & Physicochim Solide, F-59652 Villeneuve Dascq, France

来源：

COMPTES RENDUS CHIMIE | 2004年 / 7卷 / 3-4期

关键词：

phosphate glass; tin-119; NMR; posphorus-31NMR;

D O I：

10.1016/j.crcri.2003.12.012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

x SnO-(100-x) P2O5 glasses (0.30less than or equal toxless than or equal to0.75) were prepared under argon atmosphere. The Sn2+/Sn-total ratio, determined by wet chemical analysis, varies from 90 to 99% depending on glass composition. Glass transition temperatures are very low, and no effect of Sn4+ could be detected. Glass structure was characterised with P-31 and Sn-119 NMR. There is no evidence for a specific Q(n) site bonded to Sn4+, but taking into account the amount of Sn4+ enabled to obtain Q(n) distribution close to calculated values for binary site distribution. Sn-119 NMR spectra were recorded in static conditions. Chemical shift anisotropy (CSA) of glasses were compared to crystalline reference compounds. Tin(II) local environment in glasses is close to a trigonal pyramid, and Sn4+ NMR parameters are in accordance with a local environment similar to SnP2O7. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved.

引用

页码：377 / 382

页数：6

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