The Effect of Boehmite on Wet Green Strength for Direct Coagulation Casting of Alumina

Journal of Inorganic Materials

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The Effect of Boehmite on Wet Green Strength for Direct Coagulation Casting of Alumina

XIE Zhipeng; YANG Jinlong; HUANG Yong; Will J⁺; Cauckler L J⁺

Department of Materials Science and Engineering; Tsinghua University Beijing 100084 China; ⁺Swiss Federal Institute of Technology, Zurich; Switzerland

Received:1996-09-29 Revised:1996-11-25 Published:1997-12-20 Online:1997-12-20

Abstract

Abstract: In order to improve wet strength of DCC-green bodies boehmite sols were added into α-Al₂O₃ suspensions. In the present paper, the properties of wet green bodies, drying
behaviours and densification process of Al₂O₃+AlOOH system were studied. The results indicated that wet compressive strength and modulus could be largely
increased with a small amount of boehmite addition. As the solid loading of boehmite is less than 3 vol% there is no influence for drying process. The α-Al₂O₃ ceramics with
very high sintered densities of 3.97 g/cm³ (99.7% TD) and homogeneous microstructure could be achieved after sintering.

Key words: direct coagulation casting, alumina, boehmit

XIE Zhipeng,YANG Jinlong,HUANG Yong,Will J,Cauckler L J. The Effect of Boehmite on Wet Green Strength for Direct Coagulation Casting of Alumina[J]. Journal of Inorganic Materials.

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The Effect of Boehmite on Wet Green Strength for Direct Coagulation Casting of Alumina

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