Title:
ハニカム構造体、ハニカム構造体の製造方法及び排気ガス浄化装置
Document Type and Number:
Japanese Patent JP4666390
Kind Code:
B2
Abstract:
The present invention aims to provide a honeycomb structural body which is high in mechanical strength, has no cracks even when a thermal stress is generated, is less susceptible to generation of cracks or damage and is excellent in durability even in the case where a high pressure is applied from an outer peripheral face thereof, and is excellent in push-out strength. The honeycomb structural body of the present invention is a honeycomb structural body which has irregularities formed on an outer peripheral face thereof and that of a ceramic block, wherein when a least square curve is determined by a least square method on the basis of points constituting the contour of a cross-section perpendicular to the length direction of the honeycomb structural body, a center-of-gravity thereof is defined as c1, a distance between a minimum concentric circumscribed curve, having c1 as the center-of-gravity, of the least square curve and the center-of-gravity c1 is defined as D1, a distance between a maximum concentric inscribed curve, having c1 as the center-of-gravity, of the least square curve and the center-of-gravity c1 is defined as D2, and (D1 - D2) is defined as M1, the following inequality is satisfied: 0.3 mm ¤ M1, and when a least square curve is determined by a least square method on the basis of points constituting the contour of a cross-section perpendicular to the length direction of the ceramic block, a center-of-gravity thereof is defined as c2, a distance between a minimum concentric circumscribed curve, having c2 as the center-of-gravity, of the least square curve and the center-of-gravity c2 is defined as D3, a distance between a maximum concentric inscribed curve, having c2 as the center-of-gravity, of the least square curve and the center-of-gravity c2 is defined as D4, and (D3 - D4) is defined as M2, the following inequality is satisfied: 0.5 mm ¤ M2 ¤ 7.0 mm.
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Inventors:
Yutaka Yoshida
Application Number:
JP2006519312A
Publication Date:
April 06, 2011
Filing Date:
December 24, 2004
Export Citation:
Assignee:
IBIDEN CO.,LTD.
International Classes:
F01N3/02; B01D39/00; B01D39/20; B01D46/00; B01D46/24; B01D53/86; B01D53/94; B01J33/00; B01J35/04; C04B38/00; F01N3/022; F01N3/035; F01N3/28
Domestic Patent References:
| JP2001162121A | 2001-06-19 | |||
| JP2001329836A | 2001-11-30 | |||
| JP2003262118A | 2003-09-19 |
Attorney, Agent or Firm:
Atomi International Patent Office
Yasuo Yasutomi
Toki
Yasuo Yasutomi
Toki