| 摘要 |
<p>There is disclosed a honeycomb structure capable of appropriately suppressing a temperature rise near the outlet side of the structure during the regeneration of a filter and preventing a pressure loss from excessively increasing in a case where the structure is used in a DPF. The honeycomb structure has a constitution in which segments having a honeycomb shape are integrally joined. Each of the segments has a porous base material having the honeycomb shape, and a modified portion formed by impregnating a part of the base material with a slurry including particles smaller than the average pore diameter of the base material, followed by a heat treatment, the base material has a porosity of 30 to 80% and an average pore diameter of 5 to 40 µm, and the modified portion is partially formed on the section of a segment 2a or 2b vertical to the axial direction of the cells, and has a porosity which is 2 to 20% lower than that of the base material and an average pore diameter which is 0.1 to 10 µm smaller than that of the base material.</p> |
