Patent ID: 8999224
Filing Date: 2015-04-07
Classification: B01D,B01J,B29C,C04B,Y10T

Abstract:
1. A method for forming a porous ceramic honeycomb article, the method comprising: forming a batch mixture comprising cordierite-forming raw materials, glass-forming raw materials, at least one ceramic processing aid and water; extruding the batch mixture into a green honeycomb article; firing the green honeycomb article under conditions sufficient to produce the porous ceramic honeycomb article having a primary cordierite phase and an intercrystalline glass phase, wherein, after firing, the porous ceramic honeycomb article exhibits an as-fired microcrack parameter Nb washcoating and calcining the porous ceramic honeycomb article, wherein the porous ceramic honeycomb article exhibits a coated microcrack parameter Nb thermally treating the porous ceramic honeycomb article, wherein at least a first portion of the porous ceramic honeycomb article exhibits a first treated microcrack parameter Nb wherein the primary cordierite phase comprises domains of cordierite crystallites having a domain length parameter ≧40 microns, the cordierite crystallites having a subparallel orientation with one another within the domains, and further wherein an orientation of the cordierite crystallites within the domains differs between adjacent domains.