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Aging Behavior of Metal Oxide Aerogels

Dong Jin Suh^† Tae-Jin Park Jong Ho Sonn¹ Hyoung-Yong Han¹ Jong-Choo Lim¹

Clean Technology Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 136-791, Korea ¹Department of Chemical Engineering, Dongguk University, 3-26 Phil-dong, Joong-ku, Seoul 100-715, Korea

djsuh@kistmail.kist.re.kr

Korean Journal of Chemical Engineering, January 2000, 17(1), 101-104(4), 10.1007/BF02789261

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Abstract

Aerogels of titania, zirconia, niobia and silica were prepared by CO₂ supercritical drying of the corresponding alcogels. Their porous texture could be modified by further aging of the alcogels. This kind of textural modification was found to be different according to the nature of the metal precursor and sol-gel conditions.

Keywords

Aerogel Sol-gel Supercritical Drying Aging Pore Structural Properties

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