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Microwave drying effects on the properties of alumina-zeolite foam

By Hamimah Abd Rahman, Norwahdah Rahmat and Mastura Shariff


The effects of microwave drying on the properties of alumina-zeolite foam were investigated. A polymeric sponge method was implemented for the foams preparation. Alumina powder with the particle size below 50 m was used in this study. The samples were dried in microwave oven for about 7 minutes before went through sintering process at 1350C. The results showed a small linear shrinkage of green and sintered alumina foams. The microwave drying has managed to produce porous foam bodies with strength of 2.11 MPa and porosity more than 40%. The obtained properties exhibited higher values compared to the alumina foams that have gone through conventional drying process. The implementation of microwave drying has significantly reduced the drying time of green bodies and together improved the properties of alumina-zeolite foams. This alumina zeolite foam is aimed to be used as a filter in automotive application

Topics: TA Engineering (General). Civil engineering (General)
Year: 2009
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