Journal Article10.1016/J.JEURCERAMSOC.2014.06.001
Effect of particle size distribution of raw powders on pore size distribution and bending strength of Al2O3 microfiltration membrane supports
Qibing Chang,Yulong Yang,Xiaozhen Zhang,Yongqing Wang,Jianer Zhou,Wang Xia,Sophie Cerneaux,Li Zhu,Yingchao Dong +8 more
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TL;DR: In this article, a microfiltration membrane support with particle size distribution of tri-modal is used to lower the sintering temperature of the support. But, the results show that the function of fine Al 2 O 3 grains depends on their agglomeration state: if fine Al O 3 grain distribute discretely, the bending strength increases along with a slight increase in porosity; however, the aggregated fine grains are harmful to both bending strength and pore size distribution.
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Abstract: To lower the sintering temperature of Al 2 O 3 microfiltration membrane support, Al 2 O 3 powders with particle size distribution of tri-modal are chosen. The results show that the function of fine Al 2 O 3 grains depends on their agglomeration state: if fine Al 2 O 3 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 Al 2 O 3 grains between coarse grains contributes to increase the bending strength, but has less effect on porosity. The addition of medium (and/or fine) Al 2 O 3 powder has less effect on the pore size distribution of the support if only coarse Al 2 O 3 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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