Patent ID: 8003190

Claim:
A honeycomb structure, comprising: a porous ceramic member that is a fired body in which a plurality of cells are defined by cell walls, the plurality of cells are arranged in parallel, are separated by the cell walls, and extend in a longitudinal direction of the honeycomb structure, wherein a cell density of the plurality of cells is in a range from about 31 cells/cm 2 to about 93 cells/cm 2 , wherein the honeycomb structure satisfies the following relationships: (11/6)−((10/3)× A )≦ B ≦(41/6)−((10/3)× A ) (1) about 0.1≦A≦about 0.4 (2) where A (mm) designates a thickness of the cell walls, and B (m 2 /cm 3 ) designates a specific surface area per unit volume of the cell walls, and wherein by using samples each cut out from the porous ceramic member, the specific surface area per unit volume B (m 2 /cm 3 )=(BET measured value (m 2 /g) measured by a single point BET method according to JIS R 1626× true density (g/cm 3 ) of the cell wall×(100−porosity (%)) of the cell wall)/100.