中温制备高性能刚玉-莫来石质陶瓷膜支撑体  

Preparation of high performance corundum-mullite ceramic support at medium temperature

作　　者：张利剑 汪永清 胡学兵 徐泽跃 ZHANG Lijian;WANG Yongqing;HU Xuebing;XU Zeyue(University Key laboratory of Inorganic Membrance in Jiangxi Province,Jingdezhen Ceramic Institue,Jingdezhen 333001,China;Reserearch Institut of Jiangsu Ceramic Co.Ltd.,Yixing 214221,China)

机构地区：[1]景德镇陶瓷大学江西省高等学校无机膜重点实验室,景德镇333001 [2]江苏省陶瓷研究所有限公司,宜兴214221

出　　处：《膜科学与技术》2019年第5期52-57,共6页Membrane Science and Technology

基　　金：国家自然科学基金项目(51662019);江西省自然科学基金重点项目(20161ACB21008,20143ACB21022)

摘　　要：以熟铝矾土(d 50=42.55μm)为原料,高岭土为烧结助剂,活性炭为造孔剂,在1 300℃下通过干压法,制备刚玉莫来石质陶瓷膜支撑体.采用扫描电子显微镜、孔径分析仪、万能试验机对刚玉莫来石质陶瓷膜支撑体的显微结构、孔径分布以及强度进行表征.结果表明,熟铝矾土具有良好的热稳定性,煤质活性炭显著提高支撑体孔隙率.在1 300℃制备的刚玉莫来石陶瓷支撑体孔隙率为37.0%,平均孔径为5.2μm,抗弯强度达到55.4 MPa,纯水渗透率为34.6 m^3/(m^2 h MPa),在15%的盐酸溶液环境下质量损失率为0.11%,15%NaOH碱溶液环境下损失率为0.76%,具有良好的耐化学腐蚀性能.The corundum-mullite ceramic support was fabricated at 1 300℃by a dry pressing method using calcined bauxite with the median size of 42.55μm as a starting material,Kaolin as sintering additive and activated carbon as pore-forming agent.The micro-structure,pore size distribution and flexural strength were characterized by scanning electron microscopy,pore-size analyzer and universal mechanical test.The results show that calcined bauxite has stable properties,Kaolin plays a role in helping to sinter and activated carbon significantly increases the porosity.The corundum-mullite ceramic supports prepared at 1 300℃have an open porosity of 37.0%,average pore size of 5.2μm,flexural strength of 55.4 MPa,water flux of 34.6 m^3/(m^2 h MPa),weight loss 0.11%in 15%hydrochloric acid solution and weight loss 0.76%in 15%sodium hydroxide solution and have excellect chemical corrosion resistance.

关 键 词：熟铝矾土 支撑体 活性炭 刚玉莫来石 

分 类 号：TQ174[化学工程—陶瓷工业]