Structure and formation mechanism of six-fold coordinated silicon in phosphosilicate glasses

被引：37

作者：

Miyabe, D ^{[1
]}

Takahashi, M

Tokuda, Y

Yoko, T

Uchino, T

机构：

[1] Kyoto Univ, Inst Chem Res, Amorphous Mat Lab, Kyoto 6110011, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

[3] Kobe Univ, Fac Sci, Dept Chem, Kobe, Hyogo 6578501, Japan

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.71.172202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The local structure of sixfold oxygen coordinated silicon (Si-[6]) in sodium phosphosilicate glasses has been investigated using MAS NMR spectroscopy and ab initio quantum-chemical techniques. It has been demonstrated that Si-[6] is interconnected by six. PO4 tetrahedral units by sharing only their corners, forming a nearly regular [SiO6/2](2-) octahedral site. Alkali cations behave as charge compensators of the doubly charged Si-[6] species and hence play an indispensable role in stabilizing the peculiar octahedral coordination in the glasses.

引用

页数：4

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