| 摘要 |
There is disclosed a honeycomb structure which is suitably used as a catalyst carrier for purification of an exhaust gas. In porous partition walls of the honeycomb structure, there are formed large pores which show one distribution a in a graph illustrating a pore diameter distribution and in which a pore diameter PP1 at a maximum peak value v1 of pore volumes of the one distribution a is 12 µm or more, and small pores which show the other distribution b in the graph illustrating the pore diameter distribution and in which a pore diameter PP2 at a maximum peak value v2 of pore volumes of the other distribution b is smaller than the pore diameter PP1, the pore diameter PP1 and the pore diameter PP2 satisfy a relation of 0.91 ‰¤ (PP1-PP2)/PP1 ‰¤ 0.98, and a ratio of the pore volume of the pores having pore diameters smaller than the pore diameter PP2 to a total pore volume of the partition walls is 0.5% or more and 7% or less. |
