Title:
POROUS HONEYCOMB STRUCTURE AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2002/089980
Kind Code:
A1
Abstract:
A honeycomb structure composed of a porous cell barrier wall forming a complex of a plurality of adjacent cells, and a porous honeycomb outer wall for holding the outermost circumferential cell of the cell complex while surrounding wherein the porosity is lower than 30%, basic thickness of the barrier wall is 0.03−0.076mm, surface roughness of the outer wall is 0.5−10µm or the average height from the maximal point to the minimal point on the surface of the outer wall is 5−50µm. The honeycomb structure is produced using a material containing coarse particle talc having mean particle size of 7µm or above, fine particle talc having mean particle size of 2&sol 3 or less that of the coarse particle talc, coarse particle kaolin having mean particle size of 7µm or above, and fine particle kaolin having mean particle size of 2&sol 3 or less that of the coarse particle kaolin. The honeycomb structure is suitable as a catalyst carrier for purifying exhaust gas of automobile.
Inventors:
KATO YASUSHI (JP)
NOGUCHI YASUSHI (JP)
OGAWA MASATO (JP)
NOGUCHI YASUSHI (JP)
OGAWA MASATO (JP)
Application Number:
PCT/JP2002/004237
Publication Date:
November 14, 2002
Filing Date:
April 26, 2002
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
KATO YASUSHI (JP)
NOGUCHI YASUSHI (JP)
OGAWA MASATO (JP)
KATO YASUSHI (JP)
NOGUCHI YASUSHI (JP)
OGAWA MASATO (JP)
International Classes:
B01D39/20; B01D53/86; B01J35/04; B28B3/26; C04B38/00; F01N3/02; F01N3/28; (IPC1-7): B01J35/04; B01J35/10; F01N3/28; B01D39/20
Foreign References:
| JPH10174885A | 1998-06-30 | |||
| JP2000225340A | 2000-08-15 | |||
| JP2000279729A | 2000-10-10 | |||
| JPH0286847A | 1990-03-27 | |||
| JPH11277653A | 1999-10-12 |
Other References:
See also references of EP 1384508A4
Attorney, Agent or Firm:
Watanabe, Kazuhira (No.8 Kikuboshi Tower Building 20-18
Asakusabashi 3-chome Taito-ku, Tokyo, JP)
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