Patent ID: 8449645
Filing Date: 2013-05-28
Classification: C04B

Abstract:
1. A ceramic honeycomb structure having a large number of flow paths defined by porous cell walls, said porous cell walls being composed of cordierite crystals, mullite crystals, corundum crystals and/or spinel crystals; the percentage of the X-ray diffraction intensity of the cordierite crystals being 72% or more and less than 85%, the percentage of the X-ray diffraction intensity of the mullite crystals being 15-25%, and the percentage of the total X-ray diffraction intensity of the corundum crystals and the spinel crystals being 5% or less, per the total X-ray diffraction intensity of these crystals, wherein the X-ray diffraction intensity of each crystal is the intensity of a main peak converted from each X-ray diffraction intensity of a (102) plane of cordierite, a (110) plane of mullite, a (104) plane of corundum and a (220) plane of spinel; said porous cell walls having a true density of 2.55-2.70 g/cm the volume of pores having diameters exceeding 50 μm being 8-25% of the total pore volume; the volume of pores having diameters of less than 10 μm being 16-25% of the total pore volume; and the pore diameter distribution deviation σ[=log(D