METHODS FOR PREPARING CERAMIC FIBER FILTER TUBES WITH HIGH AIR PERMEABILITY

Abstract: a method for preparing a ceramic fiber filter tube with high air permeability, including: using mullite short fibers as aggregates, adding glass fibers and silica sol as sintering aids, obtaining a ceramic fiber filter tube green body by using a filterer-pressing forming process, and obtaining the ceramic fiber filter tube with high air permeability by freeze-drying and heat treatment in turn. the combination of two sintering aids with different properties can effectively improve the performance of ceramic fiber filter tube prepared by a wet forming technology. at the same time, the freeze-drying treatment can block the migration path of nanoparticles in the silica sol to the surface of the ceramic fiber filter tube due to the capillary force, so that the properties of the prepared ceramic fiber filter tube are more uniform, providing a reference for the preparation of a ceramic fiber membrane with high flux.

Inventor(s): Zhaoxiang ZHONG, Shiying NI, Dong ZOU, Yanmin GONG, Weihong XING

CPC Classification: B01D67/00411 (Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus)

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