PRODUCTION PROCESS OF POROUS CERAMICS BY FOAM METHOD

摘要

PURPOSE: Provided is a production process of porous ceramics which utilizes a foam method to form a pore by keeping viscosity to a certain degree and stirring and raises the stability of slurry foam so that it keeps the size of the pore uniform. CONSTITUTION: The production process of porous ceramics by the foam method comprises the steps of: (i) adding 20-35wt% of distilled water and 3-8wt% of viscosity adjuster to 100wt% of inorganic powder; (ii) crushing in a ball-mill to produce slurry with less than 5 micrometer in average granularity and 80-2000cp in viscosity; (iii) putting slurry into a stirrer and adding 0.15-1.50wt% of foaming agent to stir at high rate to form slurry foam; (iv) adding 1-3wt% of gelling agent, stirring at low rate, molding in a certain type and charging into a furnace; and (v) raising temperature to 1100-1600deg.C at 1-3 deg.C/min to fire.