The fractal and percolation analysis of a polymeric Al2O3 gel

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Title:	The fractal and percolation analysis of a polymeric Al2O3 gel
Authors:	Tsay,CS;Lee,CK;Chiang,AST
Contributors:	化學工程與材料工程學系
Keywords:	POROUS SOLIDS;NONINTEGER DIMENSIONS;SURFACES;ADSORPTION;CHEMISTRY
Date:	1997
Issue Date:	2010-06-29 17:31:32 (UTC+8)
Publisher:	中央大學
Abstract:	Fractal and percolation analysis have been performed on nitrogen adsorption isotherms of polymeric Al2O3 xerogel, prepared from a low-water non-aqueous solution of aluminum alkoxide. These xerogels showed a distinctively low pore connectivity compared to that reported in the literature on more conventional alumina gels. The alumina xerogel exhibited a surface fractal behavior in the scale range from nitrogen size to a few nanometers. The mean pore coordination number and the surface fractal dimension of the xerogel were rather stable upon calcination, until the appearance of the alpha-alumina crystalline phase, despite of a large decrease in BET surface area and pore volume. (C) 1997 Elsevier Science B.V.
Relation:	CHEMICAL PHYSICS LETTERS
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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