Novel Non-Hydrolytic Sol-Gel Route to Metal Oxides

被引：52

作者：

Acosta, S. ^{[1
]}

Corriu, R. ^{[1
]}

Leclercq, D. ^{[1
]}

Mutin, P. H. ^{[1
]}

Vioux, A. ^{[1
]}

机构：

[1] Univ Montpellier 2, F-34095 Montpellier 5, France

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1994年 / 2卷 / 1-3期

关键词：

non-hydrolytic gelation; gelation mechanism; alumina gel; mullite; chloroalkoxides;

D O I：

10.1007/BF00486208

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：

Monolithic alumina and aluminosilicate gels have been prepared using a novel sol-gel process based on the non-hydrolytic condensation reaction between a metal halide and a metal alkoxide. XRD indicated that the alumina gel remained amorphous at 750 degrees C; solid state Al-27 NMR indicated the presence in the dried gel and in the amorphous calcined sample of a large amount of pentacoordinated aluminum atoms. A study of the sol formation using liquid state Al-27 NMR suggested that the gel structure was reminiscent of the oligomeric structure of the chloroisopropoxide precursors. Differential thermal analysis and XRD indicated that the aluminosilicate gels were converted to mullite below 1000 degrees C, suggesting a high degree of homogeneity in these precursors.

引用

页码：25 / 28

页数：4

共 15 条

[1]

BHATT V, 1983, SYNTHESIS-STUTTGART, V4, P249

[2]

Brinker C.J., 1990, SOL GEL SCI PHYS CHE, P59

[3] ALUMINUM COORDINATION AND LEWIS ACIDITY IN TRANSITION ALUMINAS [J].