Cordierite aluminum magnesium titanate compositions and ceramic articles comprising same
AssigneeCorning Incorporated
InventorsGregory Albert Merkel, Patrick David Tepesch, Raja Rao Wusirika
Life of this patent
Estimating the term…
Abstract
Disclosed are ceramic bodies comprised of composite cordierite aluminum magnesium titanate ceramic compositions and methods for the manufacture of same.
Claims11
1-20. (canceled)
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;
- from 5 to 25% SiO2, and a metal oxide sintering aid, 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.
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;
- from 5 to 25% SiO2, and at least one metal oxide sintering aid, wherein the ceramic article comprises a total porosity % P greater than 40% by volume.
Dependencies are inferred from the claim text.