US 11,858,857 B2
Silicon carbide ceramic honeycomb structure and its production method
Kenichiro Shimizu, Fukuoka (JP)
Assigned to PROTERIAL, LTD., Tokyo (JP)
Appl. No. 18/037,696
Filed by PROTERIAL, LTD., Tokyo (JP)
PCT Filed Mar. 23, 2022, PCT No. PCT/JP2022/013530
§ 371(c)(1), (2) Date May 18, 2023,
PCT Pub. No. WO2022/202903, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 2021-054389 (JP), filed on Mar. 26, 2021.
Prior Publication US 2023/0322630 A1, Oct. 12, 2023
Int. Cl. C04B 35/565 (2006.01); C04B 35/636 (2006.01); F01N 3/28 (2006.01); B01D 46/24 (2006.01); C04B 35/626 (2006.01); C04B 35/64 (2006.01); F01N 3/022 (2006.01); B01D 39/20 (2006.01); C04B 38/00 (2006.01)
CPC C04B 35/565 (2013.01) [B01D 39/2068 (2013.01); B01D 46/2429 (2013.01); B01D 46/24491 (2021.08); B01D 46/24492 (2021.08); C04B 35/62655 (2013.01); C04B 35/6365 (2013.01); C04B 35/64 (2013.01); C04B 38/0009 (2013.01); F01N 3/0222 (2013.01); F01N 3/2828 (2013.01); B01D 2239/10 (2013.01); B01D 2239/1208 (2013.01); B01D 2239/1216 (2013.01); B01D 2279/30 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3826 (2013.01); C04B 2235/6021 (2013.01); C04B 2235/656 (2013.01); C04B 2235/6583 (2013.01); F01N 2330/06 (2013.01); F01N 2330/32 (2013.01); F01N 2330/48 (2013.01); F01N 2370/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A silicon carbide ceramic honeycomb structure having large numbers of axially penetrating flow paths partitioned by porous silicon carbide cell walls,
said cell walls comprising silicon carbide particles as aggregate and binder layers for binding said silicon carbide particles, and containing no metallic silicon,
said binder layer consisting of a cordierite phase and a spinel phase, or consisting of a cordierite phase, a spinel phase, and at least one optional component selected from the group consisting of cristobalite, mullite and forsterite,
the molar ratio M1 of said cordierite phase [=cordierite phase/(cordierite phase+spinel phase)] being 0.4-0.9,
the porosity of said cell walls being 38-50%, and
the median pore diameter of said cell walls being 5-20 μm.