Patent ID: 6395202
Filing Date: 2002-05-28
Classification: C04B

Abstract:
A process for the production of a porous molded part comprising the steps of:dispersing a metallic or nonmetallic solid material, at least one inorganic binder, and at least one organic binder in water to form a casting slip; gel casting or freeze casting the casting slip into a negative casting mold to form a molded part; removing the molded part from the casting mold; freezing the gel cast removed molded part or maintaining the freeze cast removed molded part in a frozen state; the frozen molded part under a vacuum of no more than 600 Pa (6 mbars) at 0-60Â° C. to form a green compact; and heating the green compact in air in a shield gas atmosphere, or under vacuum to 1500Â° C., while maintaining the maximum heating temperature for up to 5 hours to form the molded porous part.