多孔陶瓷分离膜支撑体的制备研究

采用氧化铝为主要原料制备出多孔陶瓷分离膜支撑体，对原料粉体做了TG/DSC曲线分析，研究了支撑体的烧结温度对收缩率的影响及烧结温度、保温时间和原料粉体粒径对孔结构、孔径的影响，造孔剂用量对孔隙率的影响。结果表明：在烧结温度为1200℃，保温时间4h，控制造孔剂用量大于20%时，制备出孔径分布均匀，孔隙率大于50%，符合透水要求的多孔陶瓷分离膜支撑体。

Study on Preparation of Porous Ceramic Separation Membrane Supports

Porous ceramic separation membrane supports are prepared using alumina fine as the main raw materials,and the TG/DSC curves of the powder of raw materials are analyzed.The effect of the supports′ sintering temperature on the shrinkage rate is studied.The effects of different sintering temperature,holding time and materials powder particle size on pore structure and size of the supports are also studied.The effect of the pore former dosage on porosity is also within the scope of study.The results show that porous ceramics separation membrane supports of uniform pore size distribution and with porosity more than 50% and pervious to water can be prepared under the following optimum conditions: sintering temperature being 1 200 ℃,holding time being 4 h,and porous agent being more than 20%.