Anisotropic cordierite monolith

Details Anisotropic cordierite monolith Anisotropic cordierite monolith

C - Chemistry, Metallurgy

04

B

25/126, 261/33,

C04B 35/18 (2006.01) B01D 53/86 (2006.01) C03C 10/00 (2006.01) C04B 35/195 (2006.01)

Patent

CA 1059159

ANISOTROPIC CORDIERITE MONOLITH Abstract of the Disclosure An extruded, honeycombed monolithic fired ceramic whose primary crystal phase is cordierite, which contains less than by weight, 0.1% CaO and 0.4% Na2O plus K2O, and whose micro- structure is characterized by a greater than random orientation of the anisotropic cordierite crystallites with their low expansion direction aligned substantially parallel to the plane of the webs of the monolith. The axial expansion co- efficient of the honeycomb, with composition near that of stoichiometric cordierite, may be as low as 5.5 x 10-7in./in./°C. or lower in the range of 25°-1000°C. The product is particularly adapted to use as a catalytic support matrix for emissions control.

210711

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