Effect of pore structure on gas permeability constants of porous alumina |
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| Authors: | Jae Kim Jang-Hoon Ha Jongman Lee In-Hyuck Song |
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| Affiliation: | 1. Powder and Ceramics Division, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Seongsangu, Changwon 51508, Republic of Korea;2. Department of Advanced Materials Engineering, University of Science & Technology (UST), 797 Changwondaero, Seongsangu, Changwon 51508, Republic of Korea |
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| Abstract: | Porous alumina was fabricated using different particle size, sintering temperature, and particle size and content of poly (methyl-methacrylate) (PMMA) as pore former. The Forchheimer equation was used to investigate the relationship between porosity and average pore size, and obtain the permeability constants k1 and k2 (the viscous effect and the inertial effect, respectively). Compared to Darcy's law, the Forchheimer equation established a more realistic and reliable relationship between fluid pressure and fluid velocity. k1 and k2 were found to be more sensitive to the average pore size than to the porosity of alumina. Moreover, reliable relationships were confirmed between the average pore size and k1, k2, and their ratio (k1/k2). |
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| Keywords: | Porous ceramics Gas permeability Permeability constant Forchheimer equation |
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