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 |
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.
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