HONEYCOMB CERAMIC STRUCTURE AND METHOD FOR PREPARATION THEREOF

Title:

HONEYCOMB CERAMIC STRUCTURE AND METHOD FOR PREPARATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2002/002479

Kind Code:

A1

Abstract:

A honeycomb ceramic structure which has a chemical composition: SiO¿2?: 42 to 56 %, Al¿2?O¿3? : 30 to 40 %, and MgO: 12 to 16 wt %, and has a crystal phase comprising cordierite as a main phase, characterized in that it has a porosity of 55 to 65 % and an average pore diameter of 15 to 30 µm, and a total area of the pores exposed on the surface of the partition walls constituting the honeycomb ceramic structure is 35 % or more relative to the total surface area of the partition walls; and a method for preparing the honeycomb ceramic structure which comprises adding, to raw materials for a cordierite ceramic, 15 to 25 wt % of graphite and 5 to 15 % of a synthetic resin as agents for making pores, kneading the resulting mixture, and forming it into a honeycomb structure, followed by drying and firing. The honeycomb ceramic structure allows the achievement of high capturing efficiency together with low pressure loss.

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Inventors:

KUMAZAWA KAZUHIKO (JP)
NOGUCHI YASUSHI (JP)
NISHI HIDEAKI (JP)
SUENOBU HIROYUKI (JP)

Application Number:

PCT/JP2001/005491

Publication Date:

January 10, 2002

Filing Date:

June 27, 2001

Export Citation:

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Assignee:

NGK INSULATORS LTD (JP)
KUMAZAWA KAZUHIKO (JP)
NOGUCHI YASUSHI (JP)
NISHI HIDEAKI (JP)
SUENOBU HIROYUKI (JP)

International Classes:

F01N3/02; B01D39/20; B28B3/26; C04B35/195; C04B38/00; C04B38/06; (IPC1-7): C04B38/06

Foreign References:

EP0761279A2	1997-03-12
JPH08323123A	1996-12-10

Other References: