Effect of particle size distribution of raw powders on pore size distribution and bending strength of Al2O3 microfiltration membrane supports |
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| Affiliation: | 1. Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;2. Institute for Sustainable Industries & Liveable Cities, Victoria University, PO Box 14428, Melbourne, Australia;3. College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China;1. CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, PR China;2. Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, School of Materials Science and Engineering, Qilu University of Technology, Jinan, PR China;3. School of Materials Science and Engineering, Nanyang Technological University, Singapore;4. CAS Key Laboratory of Materials for Energy Conversion, Department of Material Science and Engineering, University of Science and Technology of China, PR China;5. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, PR China |
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| Abstract: | To lower the sintering temperature of Al2O3 microfiltration membrane support, Al2O3 powders with particle size distribution of tri-modal are chosen. The results show that the function of fine Al2O3 grains depends on their agglomeration state: if fine Al2O3 grains distribute discretely, the bending strength of the support increases along with a slight increase in porosity; however, the aggregated fine grains are harmful to both bending strength and pore size distribution of the support. The bridging of medium Al2O3 grains between coarse grains contributes to increase the bending strength, but has less effect on porosity. The addition of medium (and/or fine) Al2O3 powder has less effect on the pore size distribution of the support if only coarse Al2O3 grain forms the support's framework, which suggests a new way to prepare the support with both high bending strength and high porosity at low temperature. |
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| Keywords: | Porous ceramic Alumina membrane support Particle size distribution Pore size distribution Bending strength |
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