A comparative study of green alumina foams prepared by microwave and conventional drying

Abd Rahman, Hamimah and Shariff, Mastura and Rahmat, Norwahdah (2009) A comparative study of green alumina foams prepared by microwave and conventional drying. In: 4th International Conference on Recent Advances in Materials, Minerals & Environment and 2nd Symposium on Materials & Processing 2009, 1 -3 June 2009, Penang, Malaysia.

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Abstract

Drying is one of the important processes in ceramic fabrication. A comparative study on physical and mechanical properties of green alumina foams prepared by conventional and microwave drying (MWD) techniques has been done. The alumina-zeolite foams were fabricated through polymeric sponge method. Linear shrinkage of green alumina foams which gone through MWD was lowered by 50% compared to the conventional drying method. The equivalent value of dry moisture content for sample dried at 80C for 6 hrs in an oven could be achieved by MWD for only 7 minutes. Strength of green alumina foams was significantly being improved through MWD technique. The increment in flexural and compressive strength was found to be 14% and 39% respectively. Besides that, the shapes of alumina foams were maintained in most of the structures. In this study, the results revealed that MWD has successfully given an enhancement to the properties of green alumina foams.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:microwave drying; green alumina foam; strength; linear shrinkage; moisture content
Subjects:T Technology > TP Chemical technology
Divisions:Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
ID Code:584
Deposited By:Mrs Hamimah Abd.Rahman
Deposited On:01 Jan 2011 23:53
Last Modified:29 Apr 2011 14:41

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