| 摘要 |
Provided is a plugged honeycomb structure with high heat capacity, low initial pressure loss, small increase in pressure loss during the deposition of particulate matter, and high trapping efficiency of particulate matter. A plugged honeycomb structure 100 includes: a pillar-shaped honeycomb substrate 4 having a partition wall base material 1 that defines a plurality of cells 2 serving as a through channel of fluid; a plugging portion 5 disposed at open ends of predetermined cells 2b at an inflow-side end face 11 of fluid and at open ends of residual cells 2a at an outflow-side end face 12 of fluid; and a porous trapping layer 6 disposed at least at a surface of the partition wall base material 1 of the residual cells 2a. The partition wall base material 1 is formed by a base material porous body including cordierite as a main phase, the trapping layer 6 is formed by a trapping layer porous body including cordierite as a main phase, and a part of the trapping layer 6 penetrating into pores formed at the partition wall base material 1 has a thickness of 0 to 20 µm. |
