具有梯度孔结构多孔陶瓷膜支撑体的制备  

Fabrication of Ceramic Membrane Support with Gradient Pore Structures

作　　者：漆虹[1] 江晓骆[1] 李世大[1] 韩静[1] 

机构地区：[1]南京工业大学膜科学技术研究所,材料化学工程国家重点实验室,南京210009

出　　处：《硅酸盐学报》2011年第2期239-245,共7页Journal of The Chinese Ceramic Society

基　　金：国家重点基础研究发展计划(2009CB623400);国家自然科学基金青年基金(20906047);化学工程联合国家重点实验室开放课题(SKL–ChE–09A01)资助项目

摘　　要：采用平均粒径为0.56μm的Al2O3为原料,研究了不同固相含量的Al2O3悬浮液的流变性能。在此基础上,釆用含10%(质量分数,下同)Al2O3的悬浮液,通过重力沉降和真空抽吸过程,成功制备出具有梯度孔结构的片状Al2O3支撑体。对具有梯度孔结构支撑体的微观结构进行了表征,并研究了支撑体的孔隙率和渗透性能随烧成温度的变化。结果表明:以固相含量为10%的Al2O3悬浮液,通过调节其流变性能,可以通过重力沉降和真空抽吸的方法制备出具有梯度孔结构的支撑体,其渗透通量高于具有均匀孔结构的支撑体,在烧成温度为1 100℃时,梯度支撑体的纯水通量约为75 L/(m2·h·MPa)。Rheological properties of suspensions with various mass fraction of alumina（with average particle size of 0.56 μm） were investigated.The effect of mass fraction of Al2O3 suspension on the pore structures of support was also studied.The alumina disk supports with gradient pore structures were successfully fabricated by using 10% in mass Al2O3 suspensions through sedimentation and subsequent vacuum filtration.The porosity and permeability of the supports as a function of sintering temperature was studied and compared with the data cited from references.The pure water flux of the supports with gradient pore structures is about 75 L/（m2？h？MPa）,which is higher than that of the supports with uniform pore structures.

关 键 词：陶瓷膜 多孔氧化铝支撑体 梯度孔结构 重力沉降 

分 类 号：TQ174[化学工程—陶瓷工业] TQ050.421[化学工程—硅酸盐工业]