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Citation: XU Zi-Jie, GAN Li-Hua, PANG Ying-Cong, CHEN Long-Wu. Preparation of Al₂O₃ Bulk Aerogels by Non-supercritical Fluid Drying Technology[J]. Acta Physico-Chimica Sinica, ;2005, 21(02): 221-224. doi: 10.3866/PKU.WHXB20050223 shu

Preparation of Al₂O₃ Bulk Aerogels by Non-supercritical Fluid Drying Technology

1.
DepartmentofChemistry,TongjiUniversity,Shanghai　200092

Received Date: 21 July 2004
Available Online: 15 February 2005

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, tetra-ethylorthosilicate (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.
- Aerogels;Drying at ambient pressure;Al₂O₃;Gel network inducing agent
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Preparation of Al2O3 Bulk Aerogels by Non-supercritical Fluid Drying Technology

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通讯作者: 陈斌, bchen63@163.com

Preparation of Al₂O₃ Bulk Aerogels by Non-supercritical Fluid Drying Technology