Abstract: |
The present invention discloses a 'freezing-gelling molding' process for preparing a porous ceramic material and belongs to the field of ceramic materials. By combining low temperature freezing molding with heat induced gelling solidification molding of ceramic materials and adopting macromolecule polymers, solvents, initiators or chelating agents as well as ceramic powders as raw materials, said process prepares a suspension containing a certain solid phase volume; by adopting a quick continuous heat processing course of 'crystallization melting-gelling solidification-solvent vaporization hole formation' performed inwards from blanks surfaces to obtain ceramic bodies with a microstructure of a frozen sample maintained therein, wherein the appearance of the pores is similar to that of solvents in crystallization state, then a ceramic material having a variety of porous structures and exhibiting excellent mechanical properties is obtained. The process conditions of the present invention is easy to realize, the suitable material system range is broad, and then the process is suitable of a plurality of purposes, such as filters used in high temperature conditions and catalyzer carrier and the like. |