Material for NOx trap support

摘要

A ceramic support element for a NOx trap which includes a NOx storage component comprising an alkali metal, the ceramic support having a composition lying within a ternary system selected from the group consisting of Al2TiO5-MgTi2O5-MgAl2O4 and Al2TiO5-FeTiO5-Al2O3, a coefficient of thermal expansion (22-800° C.) of less than 20x10-7/° C. and a modulus of rupture as measured on a solid rod of circular cross section of greater than 1000 pounds per square inch.