Partic. vol. 9 no. 5 pp. 492-496 (October 2011)
doi: 10.1016/j.partic.2011.02.007

Ceramic membrane separation technique for washing nano-sized ceramic powder precursors

Qiang Dong^a,*, Xingqin Liu^b, Tianshu Zhang^c

qdong@hfuu.edu.cn

Abstract

Washing using ceramic micro-filtration membranes was studied in the preparation of nano-sized TiO₂ and Al₂O₃ powder precursors obtained by wet chemical methods. The key parameters for the washing process, such as operation pressure, cross-flow velocity, and slurry concentration, were examined and optimized. The shape and size of particles influenced the structure of the filter cake, leading to different permeation flux for different systems. The results demonstrated that washing using ceramic membranes is superior to the traditional plate-and-frame filtration and could be considered an advanced technique for ultra-fine powder preparation by wet-chemical method.

Graphical abstract

Keywords

Nano-sized ceramic powder; Wet-chemical method; Ceramic membrane; Washing; Filtration