Ceramic fiber felt

Details Ceramic fiber felt Ceramic fiber felt

C - Chemistry, Metallurgy

04

B

117/43

C04B 35/18 (2006.01) D04H 5/04 (2006.01) C04B 31/10 (1980.01)

Patent

CA 1142808

ABSTRACT OF THE DISCLOSURE A ceramic fiber felt is obtained by mixing alumina crystalline ceramic fibers having at least about 60 weight percent of A12O3, the rest being SiO2 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 A12O3, the rest being primarily SiO2, 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°C. of only about 2% is very inexpensive com- pared to alumina ceramic fiber and is highly suited for use as or in furnace linings. -2-

374099

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