Influence of thermal treatment in high and low frequency dynamics of silica porous systems

被引：3

作者：

Caponi, S ^{[1
]}

Fontana, A

Mattarelli, M

Montagna, M

Terki, F

Woignier, T

机构：

[1] Univ Aquila, INFM, Dipartimento Fis, I-67100 Laquila, Italy

[2] Univ Trent, INFM, Dipartimento Fis, I-38050 Trento, Italy

[3] Univ Montpellier 2, Lab Verres, F-34095 Montpellier, France

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2004年 / 345卷

关键词：

D O I：

10.1016/j.jnoncrysol.2004.07.044

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：

Absorption and Brillouin light scattering measurements were performed, before and after the thermal treatment on silica xerogels and aerogel in the 500 < p < 1600 kg/m(3) density range. We found that the high frequency dynamics in porous systems, is very similar to the vitreous silica one. On the contrary, low frequency dynamics observed by Brillouin scattering, is very sensitive to the porosity and to the water content. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：61 / 65

页数：5

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