Ceramic fiber felt

Details Ceramic fiber felt Ceramic fiber felt

1979-05-17

1981-05-26

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

13 35, 428288, 428297, 428299, 428303, 162145, 162149, 162164R, 162181A, D04H 108, D04H 110

Patent

active

042698871

ABSTRACT:
A ceramic fiber felt is obtained by mixing alumina crystalline ceramic fibers having at least about 60 weight percent of Al.sub.2 O.sub.3, the rest being SiO.sub.2 and impurities, and having a filament length ranging from 10 to 30 mm with aluminosilicate non-crystalline ceramic fiber having from about 40 to 70 weight percent of Al.sub.2 O.sub.3, the rest being primarily SiO.sub.2, impurities, and, optionally, including a small amount of metal oxides, and having a filament length ranging from 5 to 30 mm, the weight proportions of the alumina crystalline ceramic fibers to the aluminosilicate non-crystalline ceramic fiber being from about 4:6 to 7.5:2.5, and preferably from about 4:6 to 5:5, and binding the mixture of components with an organic binder.
The ceramic fiber felt having a linear percentage shrinkage at 1400.degree. C. of only about 2% is very inexpensive compared to alumina ceramic fiber and is highly suited for use as or in furnace linings.

REFERENCES:
patent: 2917426 (1959-12-01), Bugosh
patent: 3395068 (1968-07-01), Rey
patent: 3701701 (1972-10-01), Sogi
patent: 3708317 (1973-01-01), Owen
patent: 3914490 (1975-10-01), Fusick

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