微孔无机分离膜用多孔陶瓷支撑体的研制  

Preparation of Porous Ceramic Support for Inorganic Filtration Membrane

作　　者：梁龙[1] 李建保[1] 郭钢锋[1] 何明生[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2007年第A01期579-582,共4页Rare Metal Materials and Engineering

基　　金：国家高技术研究发展计划(863计划)(2004从332060)

摘　　要：以碳化硅为原料,通过调整骨料粒径等级,并添加造孔剂和粘结剂,制备了孔隙率在35%-45%,平均孔径为40-60μm,具有狭窄的孔径分布(PSD)和很高强度的用于无机分离膜的微米级多孔陶瓷材料。在一定的烧成温度下,多孔陶瓷的平均气孔孔径与平均骨料粒径成正比。随着保温时间的延长,气孔孔径趋向均一;平均孔径增大,PSD变窄。增加粘结剂用量有利于促进PSD的集中趋势。多孔陶瓷的强度取决于骨料颗粒间的颈部连接强度,并随粘结剂用量的增加和烧成温度的提高而上升。The porous ceramics prepared from a skeletal grain material of SiC, a pore-forming material of calcium carbonate or sodium dodecyl benzene sulphonate and a binder of feldspathic glaze, controlled by adjusting grain composition were investigated. The controlled porous ceramics had apparent porosity of 35%-45%, average pore size of 40-60 μm, a narrow range of PSD and a high strength. The average pore size of the controlled porous ceramics was directly proportional to the average skeletal grain size at a considered sintering temperature. As the sintering time lengthened, the difference of pore sizes decreased, the average pore size became bigger and the range of PSD became narrower. The strength of the porous ceramics was dependent upon the strength of necks connecting skeletal grains and increased with the rise in amount of the binder and the rise of sintering temperature.

关 键 词：多孔陶瓷 碳化硅 强度 

分 类 号：TQ174.4[化学工程—陶瓷工业]