Title:
SILICON CARBIDE-BASED CERAMIC HONEYCOMB STRUCTURE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/202910
Kind Code:
A1
Abstract:
This silicon carbide-based ceramic honeycomb structure has a plurality of flow paths penetrating same in an axial direction and separated by partition walls of a silicon carbide-based porous body, and is characterized in that the partition walls have a porosity of 35-50% and a median pore diameter of 8-18 μm, and, in a cross-section of the partition walls perpendicular to the axial direction, when a straight line C passing through the center in a thickness T direction of the partition walls and being parallel to surfaces of the partition walls is drawn, and straight lines that are parallel to the straight line C and that are formed at positions separated from the straight line C by a distance of ±T/5 and ±2T/5 in the thickness direction of the partition walls are drawn, and lengths (pore widths) of pore portions intersected by the straight lines and the number of pores are measured across a predetermined length, an average pore width W that is an average value of the pore widths of all pores measured is 10-25 μm, and the number N of pores per unit length, which is a value obtained by dividing the total number of measured pores by the full length of the straight lines is 20-40 pores/mm.
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Inventors:
SHIMIZU KENICHIRO (JP)
Application Number:
PCT/JP2022/013577
Publication Date:
September 29, 2022
Filing Date:
March 23, 2022
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
B01D39/20; B01D46/00; B01J35/04; C04B35/577; C04B38/00; F01N3/022
Domestic Patent References:
| WO2004106265A1 | 2004-12-09 | |||
| WO2005009922A1 | 2005-02-03 | |||
| WO2016152236A1 | 2016-09-29 |
Foreign References:
| JP2009196104A | 2009-09-03 | |||
| JP2007290951A | 2007-11-08 | |||
| JP2009196104A | 2009-09-03 | |||
| JP2018149510A | 2018-09-27 | |||
| JP2019150737A | 2019-09-12 | |||
| JP2018122261A | 2018-08-09 |
Attorney, Agent or Firm:
TAKAISHI Kitsuma (JP)
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