31P NMR and IR Study of Highly Water-stable SrO-BaO-Nb2O5-P2O5 Glass and Glass-ceramics

被引：11

作者：

Masai, Hirokazu ^{[1
]}

Shirai, Ryota ^{[1
]}

Yoshida, Kazuki ^{[2
]}

Takahashi, Yoshihiro ^{[2
]}

Ihara, Rie ^{[2
]}

Fujiwara, Takumi ^{[2
]}

Tokuda, Yomei ^{[1
]}

Yoko, Toshinobu ^{[1
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Tohoku Univ, Sch Engn, Dept Appl Phys, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

CHEMISTRY LETTERS | 2013年 / 42卷 / 10期

关键词：

PHOSPHATE-GLASSES; SYSTEM; DURABILITY;

D O I：

10.1246/cl.130477

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We describe the preparation of [(100 - gamma)/(4)](SrO-BaO-2Nb(2)O(5))-gamma P2O5 (SBNP gamma) glasses and glass-ceramics with the Sr0.5Ba0.5Nb2O6 (SBN50) phase, using a conventional process, and the analysis of the chemical stability of the materials in water. The SBNP gamma glasses and glass-ceramics consist of orthophosphate (Q(0)) and pyrophosphate (Q(1)) units with strongly delocalized P=O bonds. Because of the presence of these phosphate units, the glasses and glass-ceramics obtained in this study show no weight changes, even after exposure to water at 70 degrees C for 100 h. We hypothesize that the lack of phosphate chains within the glass network is responsible for the superior water stability.

引用

页码：1305 / 1307

页数：3

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