| abstract |
There is provided a honeycomb structure having a small pressure loss and capable of extending the period until regeneration treatment. A columnar honeycomb structure in which a large number of through holes are arranged in parallel in the longitudinal direction across a wall portion, and the through holes have a relatively large cross-sectional area perpendicular to the longitudinal direction, The gas inflow through hole whose end on the exhaust gas outflow side is sealed, and the area of the cross section perpendicular to the longitudinal direction is relatively small, the end on the exhaust gas inflow side is sealed, and the adjacent gas inflow The distance between the centroids of the cross section perpendicular to the longitudinal direction of the through hole is equal to the distance between the centroids of the cross section perpendicular to the longitudinal direction of the adjacent gas outflow through holes, and the ceramic constituting the wall portion has an average pore diameter. The proportion of the volume of the pores having a pore diameter of 5 to 10 μm and having a pore diameter that is twice or more the average pore diameter is 20% or less with respect to the volume of all the pores. There is a partition that separates the gas inflow through holes. [Selection] Figure 1 |