Preparation and Characterization of Al2O3-Kaolin Composite Porous Ceramic Used as Ceramic Membrane Support
The high sintering temperature of Al2O3 is the main reason of the high cost of the common ceramic membrane supports.To decrease the sintering temperature,kaolin and talc were chosen as sintering aid because the reaction between kaolin,talc and Al2O3 generates cordierite.The Al2O3-cordierite porous samples were sintered in the range of 1450~1510℃.The microstructure and the bending strength of the samples were characterized.The results show that the content of kaolin is no more than 8%,the bending strength of the porous ceramic sintered at 1460℃ and 1510℃ are 77MPa and 153MPa,respectively.The further increases of the kaolin content result in the decrease of the bending strength and the porosity.The needle-like cordierite locates in the neck of Al2O3 grains.The reaction between kaolin and Al2O3 contributes to increasing the sintering velocity.The ceramic support using cordierite as sintering aid has the acid/alkali corrosion resistance in some degree.
Porous Ceramic Sintering-aid Ceramic membrane Cordierite Kaolin
Qibing Chang Ke Yang Xia Wang Kekai Cheng Yongqing Wang Jian-er Zhou
College of Materials Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333001,China College of Science and Art,Jingdezhen Ceramic Institute,Jingdezhen 333001,China
国际会议
景德镇
英文
56-59
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）