Cordierite forming batch compositions and cordierite bodies manufactured therefrom

Patent metadata

Field	Value
Publication number	US-9314727-B2
Application number	US-42331709-A
Country	US
Kind code	B2
Filing date	Apr 14, 2009
Priority date	Nov 26, 2008
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

Disclosed are cordierite bodies having relatively high porosity and controlled pore size. The porous cordierite bodies generally include a primary cordierite ceramic phase as defined herein. Also disclosed are methods for making and using the cordierite bodies.

First claim

What is claimed is:

1. A microcracked porous cordierite ceramic honeycomb body, comprising:
a total porosity (% P) of from about 40% to about 50%, where all the pores of the honeycomb body are interconnected;
a median pore size (d 50 ) in the range of from 2 microns to 10 microns;
a cell density of 600 to 900 cells per square inch;
a microcracked density (Nb 3 ) of greater than 0.4; and
a modulus of rupture strength (MOR) of at least 1.52 MPa, wherein the honeycomb body comprises a plurality of parallel cell channels separated by porous cell channel walls having a wall thickness of from 50 to 300 microns, and the coefficient of thermal expansion (CTE) in an axial direction is less than about 3.0×10 −7 /° C. over from about 25° C. to about 800° C.

2. The honeycomb body of claim 1 , wherein the median pore size (d 50 ) is from about 3 microns to about 8 microns.

3. The honeycomb body of claim 1 , wherein the modulus of rupture strength is greater than about 2.07 MPa.

4. The honeycomb body of claim 1 , wherein the elastic modulus (E mod25° C. ) measured at 25° C. is greater than about 2.76×10 3 MPa.

5. The honeycomb body of claim 1 , comprising
a total porosity (% P) of from about 40% to about 50%;
a median pore size (d 50 ) of from about 3 microns to about 8 microns; and
a modulus of rupture strength (MOR) greater than about 2.07 MPa.

6. The honeycomb body of claim 1 , wherein the microcracking density (Nb 3 ) is from 0.45 to 0.65.

Assignees

• Lu Yanxia
• Wang Jianguo
• Xie Yuming
• Corning Inc

Inventors

• Lu Yanxia
• Wang Jianguo
• Xie Yuming

Classifications

• C04B35/195 Primary

  Alkaline earth aluminosilicates, e.g. cordierite {or anorthite} · CPC title

• C04B38/0006

  Honeycomb structures (from one or more corrugated sheets by winding or stacking C04B38/0083) · CPC title

• B01D2279/30

  for treatment of exhaust gases from IC Engines · CPC title

• B01D46/0001 Primary

  Making filtering elements · CPC title

• C04B2111/00793

  as filters or diaphragms · CPC title