The ring structure of boron trioxide glass

被引：54

作者：

Joo, C ^{[1
]}

Werner-Zwanziger, U ^{[1
]}

Zwanziger, JW ^{[1
]}

机构：

[1] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2000年 / 261卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0022-3093(99)00609-2

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：

A new experiment, sensitive to the dihedral angle distribution of neighboring structural units, was applied to boron trioxide glass. The experiment consisted of correlating the NMR frequencies of neighboring baron nuclei. The frequencies are identical if the boron oxide polyhedra containing the two borons are co-planar, as found in ring systems, but differ for non-co-planar geometries. Through the rate of growth of signal intensity arising from the non-co-planar case. as compared to that obtained in a boron trioxide crystal of known structure, the fraction of boron contained in rings in the glass was determined to be 0.70 +/- 0.08. (C) 2000 Elsevier Science B.V. All rights reserved.

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页码：282 / 286

页数：5

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