| 摘要 |
PROBLEM TO BE SOLVED: To provide a particle collection filter which can effectively prevent damage caused by thermal stress in a filter regeneration without increasing pressure loss and decreasing PM collection efficiency.SOLUTION: A particle collection filter 1 includes a honeycomb structure 2 in which a plurality of honeycomb segments 3 are integrally bonded by bonding material 12. The particle collection filter includes a structure in which exhaust gas inflows from an inlet end face into a cell 7, penetrates through a diaphragm 8, and outflows from an outlet end face to outside of the cell 7. In the diaphragm 8, SiC as an aggregate is bonded by Si as a binder. At least one of an average opening diameter of pores opened on a surface of the diaphragm 8 which is an entrance of the exhaust gas penetrating through the diaphragm 8, and an average opening diameter of pores opened on a surface of the diaphragm 8 which is an exit of the exhaust gas penetrating through the diaphragm 8, is 0.1-5 μm. An average opening diameter of pores arranged on all of the diaphragm 8 is 10-30 μm. A thermal conductivity of the diaphragm 8 at a room temperature is 50-80 W/mK. |
