| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a honeycomb filter having a high regeneration limit. <P>SOLUTION: The honeycomb filter consisting of a sintered body has a lot of cells juxtaposed in the longitudinal direction across cell walls with any one ends of the cells sealed. In the honeycomb filter, a catalyst carrier layer is not formed in the region of 10% of the whole length of the honeycomb filter from the gas outflow side end face, the catalyst carrier layer is formed in the region of 25-90% of the whole length of the honeycomb filter, and a heat conductivity of the region with no catalyst carrier layer formed thereon is higher than that of the region with the catalyst carrier layer formed thereon. When a gas permeation factor of the cell wall in the region with no catalyst carrier layer formed thereon is k1 (μm<SP>2</SP>) and that in the region with the catalyst carrier layer formed thereon is k2 (μm<SP>2</SP>), the honeycomb filter satisfies the following expressions (1) and (2). (k1-k2) ≤0.5...(1). 1.0≤ k1 ≤1.5...(2). <P>COPYRIGHT: (C)2009,JPO&INPIT |
