Cordierite aluminum magnesium titanate compositions and ceramic articles comprising same

A method of manufacturing a ceramic article, comprising the steps of:

• providing an inorganic batch composition comprising a magnesia source, a silica source, an alumina source, and a titania source;
• mixing the inorganic batch composition together with one or more processing aid selected from the group consisting of a plasticizer, lubricant, binder, pore former, and solvent, to form a plasticized ceramic precursor batch composition;
• shaping the plasticized ceramic precursor batch composition into a green body;
• and
• firing the green body under conditions effective to convert the green body into a ceramic article comprising a first crystalline phase comprised predominantly of a solid solution of aluminum titanate and magnesium dititanate and a second crystalline phase comprising cordierite, the article having a composition, as expressed in weight percent on an oxide basis of from 4 to 10% MgO;
• from 40 to 55% Al2O3;
• from 25 to 35% TiO2;
• and from greater than 13 to 25% SiO2, wherein the ceramic article comprises a total porosity % P greater than 40% by volume and a coefficient of thermal expansion, as measured between 25-1000° C., of less than or equal to 15×10−7/° C.