PREPARATION OF ALUMINA GELS BY A NON-HYDROLYTIC SOL-GEL PROCESSING METHOD

被引：113

作者：

ACOSTA, S ^{[1
]}

CORRIU, RJP ^{[1
]}

LECLERCQ, D ^{[1
]}

LEFEVRE, P ^{[1
]}

MUTIN, PH ^{[1
]}

VIOUX, A ^{[1
]}

机构：

[1] UNIV MONTPELLIER 2,RHONE POULENC,CNRS,UMR 44,CASE 007,F-34095 MONTPELLIER 5,FRANCE

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1994年 / 170卷 / 03期

关键词：

D O I：

10.1016/0022-3093(94)90052-3

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 gels were prepared by a novel non-hydrolytic sol-gel route based on the condensation reaction between aluminum alkoxides Al(OR)3 and aluminum halides AlX3, through the formation of alkyl halide RX (X = Br, Cl; R = iso-propyl, sec- or ter-butyl), around 100-degrees-C. Samples were then calcined and were found to be amorphous up to about 750-degrees-C; they kept a high specific surface area to about 900-degrees-C. This delayed crystallization is correlated with the large number of five-coordinate aluminum sites measured in dried gels by Al-27 NMR spectroscopy.

引用

页码：234 / 242

页数：9

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