Honeycomb structure, exhaust gas purifying device and method for producing honeycomb structure
A pillar shaped honeycomb structure, including: an outer peripheral wall; and porous partition walls disposed inside the outer peripheral wall, the partition walls defining a plurality of cells, each of the cells penetrating from one end face to other end face to form a flow path, wherein one or both of the one end face and the other end face includes a groove portion; and wherein at least one annular conductive loop containing a conductive material is embedded in the groove portion.
1 . A pillar shaped honeycomb structure, comprising:
an outer peripheral wall; and
porous partition walls disposed inside the outer peripheral wall, the partition walls defining a plurality of cells, each cell of the plurality of cells penetrating from one end face to an other end face to from a flow path,
wherein one or both of the one end face and the other end face comprise a groove portion,
wherein at least one annular conductive loop comprising a conductive material is embedded in the groove portion,
wherein the conductive loop is a conductive particle-containing layer,
wherein the conductive particle-containing layer comprises a joining material,
wherein at least a part of the conductive loop comprises a conductive elastic member, the conductive elastic member is a conductive wire, a metal mesh, a thin portion of the conductive loop, or a spring member, and
wherein the conductive loop has a thickness of from 0.5 to 5 mm.
2 . The honeycomb structure according to claim 1 , wherein the conductive loop is embedded in the groove portion via the joining material.
3 . The honeycomb structure according to claim 1 , wherein the conductive loop is provided with heat conductive fins.
4 . The honeycomb structure according to claim 1 , wherein the groove portion is formed over the plurality of cells.
5 . The honeycomb structure according to claim 1 , wherein the plurality of cells comprise: a plurality of cells A which are opened on the one end face side and have plugged portions on the other end face; and a plurality of cells B which are arranged alternately with the plurality of cells A, and which are opened on the other end face side and have plugged portions on the one end face.
6 . The honeycomb structure according to claim 1 , wherein the partition walls and the outer peripheral wall are made of a ceramic material.
7 . The honeycomb structure according to claim 6 , wherein the ceramic material is at least one selected from the group consisting of cordierite, silicon carbide, aluminum titanate, silicon nitride, mullite, and alumina.
8 . The honeycomb structure according to claim 1 , wherein the honeycomb structure has a cell density of 5 to 93 cells/cm 2 .
9 . An exhaust gas purifying device, comprising:
the honeycomb structure according to claim 1 ;
a coil wiring that spirally surrounds an outer circumference of the honeycomb structure; and
a metal pipe for housing the honeycomb structure and the coil wiring.
10 . A method for producing the pillar shaped honeycomb structure according to claim 1
wherein the method comprises the steps of:
forming the groove portion on one or both of the one end face and the other end face; and
embedding the at least one annular conductive loop comprising the conductive material in the groove portion.
11 . The method for producing the pillar shaped honeycomb structure according to claim 10 , wherein the groove portion is formed by ultrasonic processing.