Method of preparation of ceramic foam

Details Method of preparation of ceramic foam Method of preparation of ceramic foam

1977-02-22

1978-02-21

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 43, B29H 720

Patent

active

040753034

ABSTRACT:
Ceramic foams possessing controlled permeability and uniformity are prepared by a combined rolling operation of impregnating an open-celled organic polymer foam material possessing a predetermined permeability and resilience with a fluid aqueous slurry of a thixotropic ceramic composition and immediate passage through at least two controlled roll gaps, wherein the rolls are preset to effect a temporary compression ranging from about 50 to 90% for the first pass and 70 to 90% for the second pass. The resulting material is thereby uniformly impregnated with the required amount of slurry, and is then dried and heated to remove the organic foam component. The foams prepared in accordance with the present invention are useful as filters for molten metals, especially aluminum and its alloys.

REFERENCES:
patent: 4024212 (1977-05-01), Dore et al.

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