METHOD FOR MANUFACTURING SILICON NITRIDE-COUPLED SILICON CARBIDE HONEYCOMB FILTER

    公开(公告)号:JP2003154224A

    公开(公告)日:2003-05-27

    申请号:JP2002237816

    申请日:2002-08-19

    Applicant: CORNING INC

    Abstract: PROBLEM TO BE SOLVED: To form a silicon nitride-coupled silicon carbide honeycomb monolith which compensates the drawbacks of a SiC filter for diesel particulates. SOLUTION: A plasticizable mixture containing powdery silicon carbide by about 60 wt.% to about 85 wt.%, powdery metal silicon by about 15 wt.% to about 40 wt.% and an organic component is prepared. The plasticizable mixture is extruded into a honeycomb monolith having many cells having the entrance and exit ends or faces and porous walls extending from the entrance end to the exit end. Then the honeycomb monolith is dried, heated up to 1,450 deg.C and held in an Ar atmosphere for one hour. The honeycomb monolith is nitrified at the temperature higher than 1,450 deg.C to 1,600 deg.C for an enough period to obtain a silicon nitride-coupled silicon carbide material.

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