Narrow pore size distribution aluminum titanate body and...

Details Narrow pore size distribution aluminum titanate body and... Narrow pore size distribution aluminum titanate body and...

2007-11-13

2007-11-13

Greene, Jason M. (Department: 1724)

Gas separation

Specific media material

Ceramic or sintered

C055S282300, C055S385300, C055SDIG007, C055SDIG010, C055SDIG030, C060S311000, C501S134000, C501S135000, C501S152000, C264S628000, C264S042000, C264SDIG048

Reexamination Certificate

active

11193123

ABSTRACT:
This invention relates to an aluminum titanate body having a narrow pore size distribution as characterized by the relation (d50−d10)/d50being less than 0.50 corresponding to a high degree of interconnected porosity. The body also preferably exhibits a low coefficient of thermal expansion of less than 15×10−7C−1, high porosity of at least 38% by volume, and at least 0.10% by weight metal oxide, the metal being either yttrium, calcium, bismuth, a lanthanide metal or combinations of thereof. MOR is preferably at least 450 psi. Median pore diameter is preferably at least 8 microns. The inventive ceramic body is particularly useful as a wall-flow filter for a diesel exhaust. A method of fabrication is provided where the sintering temperature is preferably between 1375°-1550° C.

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