Characterization of alumina foam from casting process
A simple direct foaming and casting process using ovalbumin based aqueous slurries for fabricating alumina-zeolite ceramic foam was demonstrated. The characteristics of alumina foam were investigated through porosity, pore size, density and strength. 70 to 90 vol.% of alumina was used with zeolite o...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Published: |
2008
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2241/ http://eprints.uthm.edu.my/2241/1/ME_ID_0153.pdf |
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| Summary: | A simple direct foaming and casting process using ovalbumin based aqueous slurries for fabricating alumina-zeolite ceramic foam was demonstrated. The characteristics of alumina foam were investigated through porosity, pore size, density and strength. 70 to 90 vol.% of alumina was used with zeolite of clinoptilolite type. Meanwhile, yeast was used as pore former agent in order to increase the porosity. Besides that, ovalbumin acted as a binder to bind the particles and encouraging foam formation. An increment in alumina loading has improved the porosity of ceramic foam but slightly reduced its strength. A ceramic foam with 90 vol.% of alumina showed the highest porosity 66.50% with the strength of 3.72 to 2.77 MPa. Therefore, the performance and utilization of these ceramic foams manufactured using this method may have a potential use in a range of applications including catalysis and filter. |
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