Effect of TiO2 content on properties of loess ceramic membrane support
SHEN Zao1, ZHOU Guangrui2, TONG Zhi2, WANG Jiayue2, YAN Xiao2
1. Xi’an Zhonghe City Engineering Supervision Consulting Co., Ltd, Xi’an 710048, China;
2. School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China
Abstract：Taking Luochuan loess with an average particle size of 38.78 μm as the aggregate, lignocellulosic (LCS) as pore former and binder, titanium dioxide (TiO2) as the sintering assistant, the rolling molding method was used to prepare the tubular porous loess ceramic support, which were characterized by pure water flux, flexural strength, acid/alkali resistance, analysis of crystal phase composition and observation of surface morphology. The effects of TiO2 content on the properties of the ceramic membrane support were investigated. The results show that the addition of TiO2 can promote the sintering and densification of loess ceramic membrane support. When the sintering temperature is 1 050 ℃ and TiO2 content is 4%, the flexural strength is 31.97 MPa, the pure water flux is 3 487.27 L/(m2·h·MPa), the porosity is 33.48%, the average pore size is 3.14 μm, the mass loss rate of acid/alkali corrosion is only 0.14% and 0.13%, and the surface of the support has a uniform grain size and more micropores.
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2019, Vol. 24 
