Title: Ceramic honeycomb structure, process for producing same and coat material for use in the production
Application Number: 03800080 Application Date: 2003.06.17
Publication Number: 1509209 Publication Date: 2004.06.30
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B01D39/20,B01D46/00,B01D53/86,B01J35/04,B28B11/12,C04B41/87,F01N3/28
Applicant(s) Name: Hitachi Metals Ltd. Address:
Inventor(s) Name: Kimura Toshiki, Otsubo Yasuhiko
Attorney & Agent: wang huimin
Abstract:
     A ceramic honeycomb structure comprising a ceramic honeycomb body comprising axial grooves on its periphery and cell walls constituting a larger number of flow paths inside the grooves, and a peripheral wall layer covering the grooves, wherein there are stress release portions at least partially in the peripheral wall layer and/or between the peripheral wall layer and the grooves. The thermal expansion coefficient of the peripheral wall layer is preferably smaller than those of the cell walls in a radial direction. The peripheral wall layer is preferably formed on the ceramic honeycomb body formed by removing a peripheral wall from a ceramic green body, before or after firing the ceramic honeycomb body.
Time: 12