RAMAN-STUDY OF GEL GLASS TRANSFORMATION IN BASE-CATALYZED SILICA

被引：10

作者：

DAHMOUCHE, K ^{[1
]}

BOUKENTER, A ^{[1
]}

BOVIER, C ^{[1
]}

DUMAS, J ^{[1
]}

DUVAL, E ^{[1
]}

SERUGHETTI, J ^{[1
]}

机构：

[1] UNIV LYON 1,CNRS,UA 442,F-69622 VILLEURBANNE,FRANCE

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1992年 / 147卷

关键词：

D O I：

10.1016/S0022-3093(05)80625-8

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：

The effects of heat treatments on silica xerogels prepared from base-catalyzed hydrolysis and condensation of TMOS were studied by low-frequency Raman scattering and electron microscopy. Raman scattering measured in the range 3-700 cm-1 revealed a low-frequency band that arises from the discrete particulate character of base-catalyzed gels at very small size scales. A continuous evolution of the internal structure of particles is observed during thermal treatment and the Raman spectra are similar to the fused silica one at 1050-degrees-C. Electron microscopy observations of the nanostructure of the xerogels correlate with the particle Raman band maximum. The evolution of the sample as a whole (pores collapsing and densification) is described.

引用

页码：251 / 255

页数：5

共 19 条

[1] PREPARATION OF MONOLITHIC SILICA-GEL AND GLASS BY THE SOL-GEL METHOD USING N,N-DIMETHYLFORMAMIDE [J].