Aligned and porous alumina ceramics prepared by camphene-based freeze-casting route: microstructure and properties. (May 2015)

• Record Type: Journal Article
• Authors: Zhang, H. X.; Zhao, C. Z.; Hong, C. Q.
• Is Part Of: Materials research innovations. Volume 19(2015)Supplement 7
• Page Start: S34
• Page End: S38
• Publication Date: 2015-05
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891715Z.0000000001512
• Languages: German
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>This investigation reports a novel room-temperature camphene-based freeze-casting method to prepare aligned and porous alumina ceramics. The ceramic/camphene/dispersant mixed slurries were solidified using a fast room-temperature cooling installation to form excessively overgrown camphene dendrites. The experimental results revealed that camphene-based freeze casting could lead to formation of an aligned and porous structure through room-temperature cooling in a copper die. As the ceramic solid loading increased from 8 to 20 vol.-%, the total porosity of the sintered porous alumina ceramics ranged from 80·5 to 67·5% and the compressive strength increased from 5·8 to 23·5 MPa. This freeze-cast processing is considered potentially useful in fabricating novel porous ceramics with special structure.</p> </abstract>