高温含尘废气净化用堇青石质多孔陶瓷过滤膜层的制备研究  

Preparation of Porous Cordierite Ceramic Filtering Membrane for High Temperature Dust-Laden Exhaust Gas Purification

作　　者：李小龙[1] 周健儿[1] 肖卓豪[1] 包启富[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西景德镇333001

出　　处：《陶瓷学报》2013年第4期402-408,共7页Journal of Ceramics

基　　金：国家科技支撑计划课题(编号:2011BAC11B08)

摘　　要：以堇青石微粉为主要原料,采用浸渍提拉法在多孔堇青石陶瓷载体上制备高温含尘气体过滤用陶瓷膜层.探讨了分散剂种类、聚丙烯酸钠添加量以及pH值对堇青石水系料浆稳定性的影响;研究了料浆的固含量、浸浆时间以及料浆粘度对膜层厚度的影响,烧成制度对陶瓷膜层与载体结合强度的影响.实验结果表明,当pH=8、固含量为14wt.％、聚丙烯酸钠为0.16wt.％时料浆稳定性最佳;浸浆时间为15s时可较好地将过滤膜厚度控制在70～80μm;经1240～1260℃保温60min烧成后可获得与载体结合良好的陶瓷膜.The ceramic membrane for high temperature dust-laden exhaust gas purification was prepared on porous cordierite ceramic by dip-coating method,using cordierite powder as the main raw material.The effects of different dispersants,sodium polyacrylate content and pH value on the stability of cordierite slurry were discussed.The influence of dip-coating time,solid content and viscosity of slurry on the thickness of membrane was studied.The effect of the sintering schedule on the membrane-substrate bonding was observed.The result showed that the slurry with the highest stability was obtained with a pH of 8,0.16wt.％ polyacrylate sodium and 14wt.％ cordierite.The thickness of the membrane could be better controlled between 70～80μm when the dip-coating time was 15s.Heat soaking at 1240～1260℃ for 60min could produce better membrane-substrate bonding.

关 键 词：堇青石 浸渍提拉法 过滤膜 

分 类 号：TQ174.75[化学工程—陶瓷工业]