PENG Wengang^1a,1b,LI Mengyong²,LIAO Qilong^1a,WANG Fu^1a

(1a.School of Material Science and Engineering;1b.State Key Laboratory of Environment-friendly Energy Materials， Southwest University of Science and Technology,Mianyang 621010,China; 2.Ya’an Weclean Environmental Protection Technology Co.,Ltd.,Ya’an 625000,China)

Abstract:Taking alumina powders with good sphericity as main raw materials and graphite powders as pore-forming agents,and adding appropriate amount of bonding agents,ceramic membrane supports were prepared.The preparation process and performance of ceramic membrane supports taking alumina powder with different sphericities as main raw materials were comparatively studied.The results show that taking alumina powders with aspect ratio of 1.002 as main raw materials for preparing the supports,the mud formed after kneading can achieve a better shape without aging.At the same time,the pores formed during accumulation process are evenly distributed.The prepared supports have good performance,including anti-three-point bending strength of 60 MPa,average pore diameter of 0.285 1 μm,porosity of 33%,and pure water flux of 0.034 L/(m²·h·Pa).Angular alumina powders are mostly in rod and sheet shapes,relatively large aspect ratio,poor sphericity,poor fluidity when powder arranging,and difficult to polymerize.If ceramic membrane supports taking prepared taking angular alumina powders as raw materials in the process without aging,it is difficult to knead the mud,and the mud after extrusion is prone to cracking.The overall performance of the supports is worse than that of the ceramic membrane supports prepared taking alumina powders with good sphericity as main raw materials.

Keywords:alumina；sphericity；ceramic membrane；support

中图分类号：TQ174.7                            文献标志码：A

文章编号：1008-5548(2022)02-0007-09

DOI:10.13732/j.issn.1008-5548.2022.02.002

收稿日期： 2021-08-30，修回日期：2021-09-10，在线出版时间：2022-02-22。

基金项目：国家自然科学基金项目，编号：51702268。

第一作者简介：彭文钢(1991—)，男，硕士研究生，研究方向为陶瓷材料。E-mail：595329283@qq.com。

通信作者简介：廖其龙(1965—)，男，教授，博士，博士生导师，研究方向为非金属材料。E-mail：liaoqilong@swust.edu.cn。