Process for forming a ceramic foam

Details Process for forming a ceramic foam Process for forming a ceramic foam

1988-05-02

1989-09-12

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Pore-forming

501 80, 501 81, 210506, 2105101, 264 44, C04B 3806

Patent

active

048660116

ABSTRACT:
The present invention relates to a ceramic foam material, preferably a ceramic foam filter, prepared by providing an open cell flexible foam having a plurality of interconnected voids surrounded by a web of the flexible foam, applying an adhesion promoting material to at least one surface of the flexible foam, impregnating the flexible foam after applying the adhesion promoting material with a ceramic slurry, drying and heating the impregnated material to remove the organic component therefrom, and firing at an elevated temperature to form the filter. In a preferred embodiment, a flocked coating is formed on at least one surface of the flexible foam prior to impregnation. The flocked coating may be formed either by first applying a solution containing an adhesive to the surface(s) and thereafter applying fibers to the surface or by applying a solution containing the adhesive and the fibers.

REFERENCES:
patent: 3090094 (1963-05-01), Schwartzwalder et al.
patent: 3833386 (1974-09-01), Wood et al.
patent: 3877973 (1975-04-01), Ravault
patent: 3907579 (1975-09-01), Ravault
patent: 3939002 (1976-02-01), Washburne
patent: 4004933 (1977-01-01), Ravault
patent: 4024212 (1977-05-01), Dore et al.
patent: 4396565 (1983-08-01), Tomita et al.
patent: 4610832 (1986-09-01), Brockmeyer
patent: 4664858 (1987-05-01), Kido et al.
patent: 4708740 (1987-11-01), Tungatt et al.

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