PREPARATION OF ALUMINA-ZIRCONIA MATERIALS BY THE SOL-GEL METHOD FROM METAL ALKOXIDES

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Title:	PREPARATION OF ALUMINA-ZIRCONIA MATERIALS BY THE SOL-GEL METHOD FROM METAL ALKOXIDES
Authors:	CHEN,YW;YEN,TM;LI,CP
Contributors:	化學工程與材料工程學系
Keywords:	TETRAGONAL ZRO2 PARTICLES;AL2O3-ZRO2 COMPOSITES;ZRO2-TOUGHENED AL2O3;CERAMIC MATRICES;GRAIN-GROWTH;STABILITY;TRANSFORMATION;MONOLITH;POWDERS
Date:	1995
Issue Date:	2010-06-29 17:33:16 (UTC+8)
Publisher:	中央大學
Abstract:	This study was carried out to develop a new preparation process for porous alumina-zirconia by the sol-gel method and to examine their porous properties. The gelation of alkoxides by the sol-gel method was used for the formation of a precursor composed of an alumina-zirconia netwook structure. By this process, porous alumina-zirconia with a large surface area (> 300 m(2)/g), a very small pore size (0.5-0.9 nm) and a small pore size distribution was prepared. The porous properties of these materials were dependent upon the zirconia content. The optimum ratios of raw materials forming the gels are C2H5OH/Al(OC4H9)(3) = 100/1, Al(OC4H9)/H2O = 2/1, Al(OC4H9)(3)/HNO3 = 20/1, Zr(OC4H9)(4)/H2O = 4/1 (in moles), which gives a transparent gel and shortest gelation time.
Relation:	JOURNAL OF NON-CRYSTALLINE SOLIDS
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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