Rachel A Dahl

US Patent:

8038759, Oct 18, 2011

Filed:

Jul 12, 2008

Appl. No.:

12/172217

Inventors:

James Jenq Liu - Mason OH, US
Bilal Zuberi - Cambridge MA, US
Rachel A. Dahl - Cambridge MA, US
William M. Carty - Alfred Station NY, US

Assignee:

Geoz Technologies, Inc. - Woburn MA

International Classification:

B01D 39/20
B01D 46/00
C04B 35/03

US Classification:

55523, 552823, 553853, 55524, 55DIG 5, 55DIG 30, 60311, 4232135, 264 44, 264628, 264631, 264DIG 48, 501 9, 501 951

Abstract:

A method of manufacturing a fibrous material includes mixing at least two cordierite precursor materials to form a mixture. One or more of the at least two cordierite precursor materials is in a form of a fiber and the mixture includes about 43% to about 51% by weight SiO, about 36% to about 41% by weight AlO, and about 12% to about 16% by weight MgO. The method also includes extruding the mixture to create a fibrous body, and heat treating the fibrous body, at a temperature of about 1200 C. to about 1420 C. , to form the fibrous material including about 50% to about 95% by weight cordierite. A fibrous body includes an extruded substrate having a plurality of fibers including about 50% to about 95% by weight cordierite. The extruded substrate has a coefficient of thermal expansion in at least one direction of less than about 3. 810per C.

US Patent:

20080292518, Nov 27, 2008

Filed:

May 24, 2007

Appl. No.:

11/753011

Inventors:

James Jeng Liu - Mason OH, US
Bilal Zuberi - Cambridge MA, US
Jerry G. Weinstein - Malta NY, US
Rachel A. Dahl - Cambridge MA, US

Assignee:

GEO2 TECHNOLOGIES, INC. - Woburn MA

International Classification:

B01D 46/04
B28B 1/00

US Classification:

422255, 264631

Abstract:

A porous cordierite substrate and a method of forming a porous cordierite substrate including providing a fiber that includes at least one cordierite precursor material and providing at least one organic binder material. The fiber and the organic binder material are mixed with a fluid. The mix of fiber, organic binder material and fluid is extruded into a green substrate. The green substrate is fired to enable the formation of bonds between the fibers and to form a porous cordierite fiber substrate.