The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2009
Filed:
Nov. 30, 2005
Douglas Munroe Beall, Painted Post, NY (US);
Gregory Albert Merkel, Corning, NY (US);
David John Thompson, Savona, NY (US);
Douglas Munroe Beall, Painted Post, NY (US);
Gregory Albert Merkel, Corning, NY (US);
David John Thompson, Savona, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A porous cordierite ceramic honeycomb article with increased mechanical strength and thermal shock resistance. The porous cordierite ceramic honeycomb article has M<2220, or M>2660 wherein()−106()+19()+17(% porosity),()+116()−26()−28(% porosity),and a CTE≦9×10/° C. in at least one direction. A method of manufacturing is also disclosed wherein the inorganic raw material mixture contains talc, an alumina-forming source, a silica-forming source, and 0-18 wt. % of a kaolin or calcined kaolin containing not more than 8 wt. % of a fine kaolin source having a median particle diameter of less than 7 μm, wherein the fired porous ceramic cordierite honeycomb article has a porosity<54% . Alternatively, if greater than 8 wt. % of the fine kaolin source is used, then a slow ramp rate is utilized from 1200° C. to 1300° C. of not more than 20° C./hr.