Porous ceramic filter and preparation thereof

Details Porous ceramic filter and preparation thereof Porous ceramic filter and preparation thereof

1992-12-16

1994-07-05

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 60, 2105101, C04B 3806

Patent

active

053265122

ABSTRACT:
A ceramic filter is prepared by mixing together a ceramic powder, a pore forming agent, and any sintering aids required in the sintering of the ceramic powder, forming a tape from the mixture, and molding filter plates from the tape. Two types of annular disk filter plates are formed. A first plate type has an opening on the external annular surface, and a second plate type has an opening on the internal annular surface. The two types of filter plates are stacked in an alternating fashion, and end pieces are added to form a filter assembly. The assembly is sintered to form a filter. The pore forming agent is preferably polystyrene microspheres that are decomposed during the sintering process, leaving porosity that effectively captures particulate impurities when a fluid is passed through the filter in service.

REFERENCES:
patent: 2996389 (1961-08-01), Fernhof
patent: 3725186 (1973-04-01), Lynch
patent: 4379109 (1983-04-01), Simpson
patent: 4816036 (1989-03-01), Kotchick
patent: 4913982 (1990-04-01), Kotchick et al.
patent: 5082607 (1992-01-01), Tange

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