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Yang Y.-L.,Jingdezhen Ceramic Institute | Yang Y.-L.,Key Laboratory of Jiangxi Universities of Inorganic Membrane | Zhou J.-E.,Jingdezhen Ceramic Institute | Zhou J.-E.,Key Laboratory of Jiangxi Universities of Inorganic Membrane | And 6 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2015

Using the in situ hydrolysis as method and tetrabuty titanate as precursor, the effect of nano-TiO2 on sintering process of alumina porous ceramic membrane support was studied. The results show that nano-TiO2 can be uniformly mixed with large size of alumina particles by insitu hydrolysis as method and using tetrabuty titanate as precursor, which helps it better sintering; Presintering temperature helps balance the nano-TiO2 adding quantity in some degree and influence the performance capabilities of the support body. SEM results show that when presintering temperature reach 1300℃, the addition amount of nano-TiO2 is 0.4wt% and after support body being calcined 2 h at 1650℃, fine particle inside the support body migrate to coarse particle neck and largely disappeared, which to some extent improve the flexural strength of support. As the holding time prolonged, the flexural strength of support improves constantly and pore size increase gradually. Nevertheless, lots of nano-TiO2 retaining in the support body is harmful to the support of sintering. © 2015, Chinese Ceramic Society. All right reserved. Source


Zhou J.-E.,Jingdezhen Ceramic Institute | Zhou J.-E.,Key Laboratory of Jiangxi Universities of Inorganic Membrane | Yang Y.-L.,Jingdezhen Ceramic Institute | Yang Y.-L.,Key Laboratory of Jiangxi Universities of Inorganic Membrane | And 8 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2014

The effect of the particle size gradients of three kinds of α-Al2O3 grains (coarse, mediate and fine grains) and the preparation technologies on the pore size distribution, porosity and bending strength of the porous ceramic membrane supports were researched in detail. The results show that the coarse grains(d50>29 μm) have the decisive effect on the pore size distribution of the membrane supports. The mass ratio of medium fine grains has the effect on the porosity and bending strength of the membrane supports in some degrees. The fine alumina particles(d50<1.6 μm) disappear and increase the neck bonding among the coarse grains after calcined at 1650 ℃ for 2 h according to the results of SEM images. The fine grains contribute to increasing the bending strength if their distribution is even. Otherwise, the priority sintering of the aggregated fine grains is harmful to the bending strength of the membrane supports. Source

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