Preparation of a High-Performance Porous Ceramic Membrane by a Two-Step Coating Method and One-Step Sintering

Applied Sciences

Jinfeng Rao¹  Yongqing Wang²  Fengli Liu²  Yulong Yang²  Qibing Chang²  Zhiwen Hu² 

[1] Civil Engineering and Urban Construction College, Jiujiang University, Jiujiang 332005, China;School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China;

关键词: ceramic membrane;    preparation process;    two-step coating method;    one-step sintering;    high-performance;   

DOI  :  10.3390/app9010052

来源: DOAJ

【 摘 要 】

Hole defects and uneven membrane thicknesses can lead to poor performance, especially in the separation stability of ceramic membranes. This paper uses a one-step sintering method, which avoids hole defects and uneven membrane thicknesses, for the preparation of high-performance and defect-free ceramic membranes. For this purpose, two kinds of ceramic membrane slurry with high or low viscosities were prepared by alumina particles, as raw materials. Both the effects of the two coating process with a one-step coating method for low-viscosity slurry, and the two-step coating method with a high viscosity flush after a low viscosity coating, on the surface properties of a ceramic membrane, were studied in detail. The result shows that the properties of ceramic membranes can be improved by a two-step coating method, with a high viscosity flush after a low viscosity coating, A high-performance and defect-free ceramic membrane was obtained by one-step sintering at 1450 °C for 2 hr with 7 wt % solid content and a coating time of 11 s.

【 授权许可】

Unknown