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US 7,550,026 B2Granted
Honeycomb filter
AssigneeIbiden Co., Ltd.
InventorSyuhei Hayakawa
Life of this patent
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Abstract
A honeycomb filter includes at least one pillar-shape honeycomb structured body including a plurality of cells partitioned by partitions, and plugs for sealing upstream openings of a plurality of first cells selected from the plurality of cells and for sealing downstream openings of a plurality of second cells selected from the plurality of cells. Each of the plugs is formed of a material having a greater total content of aluminum, iron, boron, silicon, and free carbon than a material forming the honeycomb structured body.
Claims19
A honeycomb filter, comprising:
- at least one pillar-shape honeycomb structured body having a plurality of cells separated by partitions;
- and
- plugs for sealing upstream openings of a plurality of first cells selected from the plurality of cells and for sealing downstream openings of a plurality of second cells selected from the plurality of cells,
- wherein a material forming the plugs and a material forming the honeycomb structured body both contain impurities selected from the group consisting of aluminum, iron, boron, silicon, and free carbon, and the total content of impurities in the material forming the plugs is higher than the total content of impurities in the material forming the honeycomb structured body.
1 more element
Dependencies are inferred from the claim text.