粉体颗粒参数对多孔陶瓷支撑体性能的影响  

Effect of particle parameters on the performance of porous ceramic supports

作　　者：周永欣[1] 林钰青 陈献富[1] 邱鸣慧[1] 范益群[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

出　　处：《膜科学与技术》2016年第2期81-85,共5页Membrane Science and Technology

基　　金：国家“863”计划课题(2012AA03A606);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：分别采用3种规则形状的氧化铝为骨料,添加一定量的烧结助剂,通过干压成型法制备多孔支撑体.考察了粉体颗粒参数(形状、粒径分布)对支撑体机械性能、微结构以及渗透性能的影响.研究表明:以椭球形氧化铝为骨料,添加质量分数0.6%的烧结助剂,在1 600℃烧成的多孔陶瓷膜支撑体三点弯曲强度达到80 MPa以上,孔径为3.34μm,孔隙率为34.8%,纯水渗透率在500m^3/(m^2·h·MPa)以上.A porous support consisting of spherical or ellipsoidal alumina as aggregate and a certain quantity of sintering aids was prepared by dry-pressing process.The effects of particle shape and particle size distribution on the mechanic strength,pore structure and permeability of obtained support were investigated.The results show that the support formed by ellipsoidal alumina grains and mass fraction0.6% of sintering aids,sintered at 1 600 ℃ yields a support with a three-point bending strength higher than 80 MPa,a mean pore size of 3.34μm with a porosity of 34.8% and a high pure water flux above 500m^3/（m^2·h·MPa）.

关 键 词：多孔陶瓷 氧化铝 支撑体 颗粒参数 

分 类 号：TQ174.1[化学工程—陶瓷工业]