Improved cement to make thermal shock resistant ceramic...

Details Improved cement to make thermal shock resistant ceramic... Improved cement to make thermal shock resistant ceramic...

C - Chemistry, Metallurgy

04

B

C04B 35/185 (2006.01) C04B 28/24 (2006.01) C04B 37/00 (2006.01) C04B 38/00 (2006.01)

Patent

CA 2717970

A ceramic honeycomb structure comprised of at least two separate smaller ceramic honeycombs that have been adhered together by a cement comprised of inorganic fibers and a binding phase wherein the smaller honeycombs and fibers are bonded together by the binding phase which is comprised of an amorphous silicate, aluminate or alumino-silicate glass and the cement has at most about 5% by volume of other inorganic particles. The cement may be made in the absence of other inorganic and organic additives while achieving a shear thinning cement, for example, by mixing oppositely charged inorganic binders in water together so as to make a useful cement for applying to the smaller honeycombs to be cemented.

L'invention concerne une structure alvéolaire en céramique constituée d'au moins deux alvéoles en céramique plus petites séparées collées ensemble par un ciment constitué de fibres inorganiques et d'une phase de liaison dans laquelle les petites alvéoles et les fibres sont collées ensemble par la phase de liaison qui est constituée d'un silicate amorphe, de verre d'aluminate ou d'alumino-silicate et le ciment présente au maximum environ 5% en volume d'autres particules inorganiques. Le ciment peut être obtenu en l'absence d'autres additifs inorganiques et organiques et produire un ciment par rhéo-fluidification, par exemple en mélangeant des liants inorganiques de charges opposées dans de l'eau de façon à obtenir un ciment que l'on peut appliquer aux petites alvéoles à cimenter.

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