Preparation of Al2O3 bulk aerogels by non-supercritical fluid drying technology

被引：13

作者：

Xu, ZJ ^{[1
]}

Gan, LH ^{[1
]}

Pang, YC ^{[1
]}

Chen, LW ^{[1
]}

机构：

[1] Tongji Univ, Dept Chem, Shanghai 200092, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2005年 / 21卷 / 02期

关键词：

aerogels; drying at ambient pressure; Al2O3; gel network inducing agent;

D O I：

10.3866/PKU.WHXB20050223

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al2O3 bulk aerogels were prepared by using Al(H2O)(9)(NO3)(3) as a precursor and 1, 2-epoxy propane as a gelation agent. Methane amide was used as drying control chemical additives(DCCA) to improve the gel texture and the structure evolution. Wet gels were aged by a successively solvent exchanging of alcohol, tetraethylorthosilicate (TEOS)/alcohol and alcohol at a certain temperature. The aged gels were dried at the non-supercritical fluid drying condition to obtain bulk alumina aerogels. Those aerogels had high surface areas and porosity. The mechanism about drying Al2O3 wet gels at an ambient pressure was also discussed.

引用

页码：221 / 224

页数：4

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