摘要
以平均粒径为5μm的Al_2O_3粉为主要原料,采用注浆成型法,制备出膜支撑体。再结合浸渍法涂膜工艺,在上述膜支撑体上,采用Al_2O_3粉制备顶膜。为探究顶膜显微结构和渗透性能的可控制备工艺,实验考察了原料粒径对顶膜的厚度、孔径和水渗透通量的影响规律。实验结果表明:所制备的顶膜孔径分布窄,显微结构良好、均一无缺陷。采用不同粒径Al_2O_3粉制备的顶膜,其厚度可由18μm降低到11μm、最可几孔径则从120 nm减小到60 nm、水渗透通量由1894.60 L·m^(-2)·h^(-1)·bar^(-1)降低到1588.76 L·m^(-2)·h^(-1)·bar^(-1),从而实现了顶膜的显微结构和渗透性能的量化调控制备。
Alumina support was prepared by slip casting method using alumina of the average particle size of 5 μm as main material.Combined with dip coating process, the top membrane was prepared on the alumina support using alumina powders. In order to obtain thecontrolled preparation parameters of the microstructure and permeability of the top membrane, the effects of the partlcle size of raw materialon the thickness, pore size and water permeate flux of the top membranes were studied. The results show the top membrane has a uniformmicrostructure and narrow pore size distribution. The thickness of the top film prepared with A1203 powder of different particle sizes reducesfrom 18 μm to ll gin, and the most probable pore size decreases from 120 nm to 60 nm, and the water flux reduces from 1894.60 L·m^（-2）·h^（-1）·bar^（-1）. The experimental results provide a controllable quantitative preparation method for the microstructure andpermeability of the top membrane..
出处
《陶瓷学报》
CAS
北大核心
2018年第1期43-47,共5页
Journal of Ceramics
基金
江西省普通本科高校中青年教师发展计划访问学者专项资金(赣教办函[2016]109)
国家自然科学基金(51662019)
江西省自然科学基金重点项目(20161ACB21008)
江西省教育厅科技项目(GJJ150929)
关键词
顶膜
显微结构
渗透性能
可控制备
top membrane
microstructure
permeability
controllable preparation
