Patent ID: 8192517

Claim:
A ceramic honeycomb structural body, comprising: a plurality of pillar-shaped honeycomb structural porous ceramic members, each comprising a plurality of through-holes arranged side by side through a partition wall, all of the through-holes being open on an end face of each of the porous ceramic members; and a sealing material layer interposed between and adhering together the porous ceramic members, wherein the porous ceramic member comprises ceramic particles, and inorganic fibers and/or whiskers; an amount of the ceramic particles included in the porous ceramic member is 30 to 97 mass %; an amount of the inorganic fibers and/or whiskers included in the porous ceramic member is 3 to 70 mass %; a cross sectional area perpendicular to the porous ceramic member in its longitudinal direction is not less than 5 cm 2 but not more than 50 cm 2 ; a ratio of the total cross sectional area perpendicular to the porous ceramic members in their longitudinal directions to a cross sectional perpendicular to the ceramic honeycomb structural body in its longitudinal direction is not less than 85%; a first pore group having pores within a pore diameter range of about 0.05 μm to about 150 μm; and a second pore group having pores within a pore diameter range of about 0.006 μm to about 0.01 μm, wherein a pore size distribution curve for the ceramic member includes an abscissa in pore diameter (μm) and an ordinate in logarithmic differential pore volume (cm 3 /g), such that one or more peaks exist in each of the pore diameter ranges.