Patent ID: 7033527

Claim:
A method for fabricating a highly porous ceramic which has a high porosity of not less than 60% and a pore density of not less than 10 9 pores/cm 3 from expandable microspheres and a preceramic polymer, comprising the steps of: homogeneously mixing a preceramic polymer powder in an amount of 20% by weight or more, based on the total weight of the starting materials, expandable hollow microspheres in an amount of 20% by weight or more, based on the total weight of the starting materials and a ceramic powder in an amount of 50% by weight or less, based on the total weight of the starting materials, and molding the mixture to form a molded body; heating the molded body to expand the molded body and the expandable hollow microspheres at a temperature of 110˜200° C., the temperature range between the softening point and melting point of the preceramic polymer; curing the expanded molded body; and pyrolyzing the cured molded body.