Honeycomb filter
AssigneeNGK Insulators, Ltd.
InventorsTakashi Mizutani, Shingo Iwasaki
Life of this patent
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Abstract
In a honeycomb filter 20, partition portions and trapping layers are formed such that a pore volume difference that is obtained from pore distributions measured by mercury porosimetry and is a difference in volume of pores having a diameter of 10 μm or less between the downstream portion and the upstream portion of the honeycomb filter, is in the range of 0.01 cm3/g or more and 0.08 cm3/g or less. In the honeycomb filter, in the downstream portion, a first pore volume peak is present in a first pore diameter range of 2 μm or more and 9 μm or less and a second pore volume peak that is higher than the first pore volume peak is present in a second pore diameter range of 10 μm or more and 25 μm or less.
Claims8
A honeycomb filter comprising:
- a plurality of porous partition portions forming a plurality of cells serving as channels of fluid;
- and
- trapping layers that are formed on the partition portions and configured to trap a solid component contained in the fluid,
- wherein a volume of pores having a diameter of 10 μm or less in a downstream portion of the cells measured by mercury porosimetry is larger than a volume of pores having a diameter of 10 μm or less in an upstream portion of the cells measured by mercury porosimetry by 0.01 cm3/g or more and 0.08 cm3/g or less.
Dependencies are inferred from the claim text.