NUCLEAR-SPIN RELAXATION IN ALUMINOSILICATE AEROGELS

被引：0

作者：

MALIER, L

BOILOT, JP

CHAPUT, F

DEVREUX, F

机构：

[1] Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, URA CNRS 1254

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 188卷 / 03期

关键词：

D O I：

10.1016/0022-3093(95)00193-X

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：

Spin relaxation allows one to probe lattice dynamics at a local level. Measurements in aerogels and xerogels reveal an identical behaviour as compared with glasses obtained by thermal quenching. While all thermal variations can be accounted for by a large number of activated local vibrations, these cannot explain the observed density dependence. When the density is lowered without modification of the local structure, relaxation is accelerated.

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页码：220 / 225

页数：6

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