Patent ID: 6420292
Filing Date: 2002-07-16
Classification: B01D,C02F,C04B,Y10S

Abstract:
A porous ceramic provided with amorphous pore surfaces, and having a compressive strength of 6 to 8 kg/cm2, prepared by a process comprising:mixing clay, a pore forming material, and water to form a mixture; molding the mixture to form a molded article; drying the molded article formed from the mixture; heating the molded article to a temperature from 600 to 800Â° C. over a time period of 5 to 15 hours, thereby burning the pore forming material mixed in the molded article; maintaining the molded article at a temperature of 600 to 800Â° C. for 3 to 7 hours; and calcining the article at 1,200 to 1,500Â° C., for a period of 4 to 8 hours, to form a porous ceramic having amorphous pore surfaces, and a compressive strength of 6 to 8 kg/cm2, wherein said porous ceramic has a continuous porous surface comprising amorphous materials including sodium silicate as a main component, and comprising sodium silicate or calcium oxide as a crystalline material.