Title:
HONEYCOMB STRUCTURE
Document Type and Number:
Japanese Patent JP2014188882
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a honeycomb structure the thermal shock resistance of which is improved without excessively increasing the heat capacity or pressure loss thereof.SOLUTION: The honeycomb structure has: porous partition walls 3 which are used for dividedly forming a plurality of cells so that two end faces thereof are communicated with each other; an outer peripheral wall 4 formed integrally with the partition walls 3; and such a shape that an outer peripheral shape of the cross section perpendicular to the longitudinal direction thereof contains a curve. The plurality of cells comprise perfect cells 5 each having a perfect tetragonal cell cross section and imperfect cells 6 each having an imperfect cross section because a part of the cross section is contacted with the outer peripheral wall 4 so that a tetragon is not formed. The triangular imperfect cells 6a, at least a part of each of which exists in a predetermined region, 20a, 20b, 20c or 20d, are selected. When a corner, which is of the selected triangular imperfect cell 6a and is formed at an intersection of the partition wall 3 and the outer peripheral wall 4, has an obtuse angle, the corner is thickened so that the corner has a shape selected from the group consisting of an R-letter shape, an inverted R-letter shape and a C-plane shape.
Inventors:
TAKAGI TOMOYOSHI
Application Number:
JP2013067379A
Publication Date:
October 06, 2014
Filing Date:
March 27, 2013
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
B28B3/20; B01D39/20; B01D46/00; B01J35/04; B28B11/02; F01N3/022; F01N3/28
Domestic Patent References:
| JP2003260322A | 2003-09-16 | |||
| JP2002046117A | 2002-02-12 | |||
| JP2012210610A | 2012-11-01 | |||
| JP3060539B2 | 2000-07-10 |
Foreign References:
| WO2008126692A1 | 2008-10-23 |
Attorney, Agent or Firm:
Ippei Watanabe
Koji Kikawa
Hiroyuki Sato
Shigeru Koike
Koji Kikawa
Hiroyuki Sato
Shigeru Koike