Abstract: A honeycomb structure includes: a honeycomb structure portion which includes an outer peripheral wall, and partition walls disposed inside the outer peripheral wall and partitioning a plurality of cells forming flow paths from one end surface to the other end surface; and a pair of electrode layers provided on an outer surface of the outer peripheral wall so as to extend in a strip shape along a direction in which the cells extend and sandwich a central axis of the honeycomb structure portion; wherein a porosity PW of the partition walls is 30% to 55%, and a ratio of the porosity PW of the partition walls to a porosity PO of the outer peripheral wall (PW/PO) satisfies 1<PW/PO?1.8.

Abstract: There is provided a honeycomb type heating device including: a pillar-shaped honeycomb substrate having a partition wall defining a plurality of cells extending from one end face to the other end face and a circumferential wall surrounding the partition wall; a plurality of heaters adjacently arranged on a circumferential face that is an outside surface of the circumferential wall in a circumferential direction of the circumferential face; and intermediate members interposed between the circumferential face of the honeycomb substrate and the plurality of heaters. The sum of areas of portions of the circumferential face covered with the intermediate members between the circumferential face of the honeycomb substrate and the plurality of heaters is 20 to 100% of the sum of areas of portions of the circumferential face covered with the plurality of heaters.

Abstract: There is disclosed a honeycomb structure including a honeycomb structure body, and a pair of electrode members disposed on a side surface of the honeycomb structure body, an electric resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrode members is formed into a band shape extending in a cell extending direction of the honeycomb structure body, and in a cross section orthogonal to the cell extending direction, one electrode member is disposed on a side opposite to the other electrode member via a center of the honeycomb structure body, and in the honeycomb structure body, one or more specific slits each having an open end in the side surface are formed.

Abstract: There are disclosed an information-display-equipped electric-heating-type heater, and a method of using the above information. An information-display-equipped electric-heating-type heater includes a tubular honeycomb structure made of a conductive material and having porous partition walls to define and form a plurality of cells which become through channels for a fluid and extend from one end face to the other end face, and a circumferential wall positioned in an outermost circumference; and a pair of electrodes disposed on the circumferential wall of the honeycomb structure, and information concerning a heater performance of the electric-heating-type heater is displayed in the honeycomb structure.

Abstract: There is provided a honeycomb type heating device including: a pillar-shaped honeycomb substrate having a partition wall defining a plurality of cells extending from one end face to the other end face and a circumferential wall surrounding the partition wall; a plurality of heaters adjacently arranged on a circumferential face that is an outside surface of the circumferential wall in a circumferential direction of the circumferential face; and intermediate members interposed between the circumferential face of the honeycomb substrate and the plurality of heaters. The sum of areas of portions of the circumferential face covered with the intermediate members between the circumferential face of the honeycomb substrate and the plurality of heaters is 20 to 100% of the sum of areas of portions of the circumferential face covered with the plurality of heaters.

Abstract: A reducing agent injection device includes a honeycomb structure having a honeycomb structure body and a pair of electrode members arranged in a side surface of the honeycomb structure body and a urea spraying device spraying a urea water solution in mist form. The urea water solution sprayed from the urea spraying device is supplied inside cells from a first end face of the honeycomb structure body, and urea in the urea water solution supplied in the cells is heated and hydrolyzed inside the electrically heated honeycomb structure body to generate ammonia. The ammonia is discharged outside the honeycomb structure body from a second end face and injected outside. There is provided a reducing agent injection device that can generate and inject ammonia from a urea solution with less energy.

Abstract: A reducing agent injection device includes a honeycomb structure having a honeycomb structure body and a pair of electrode members arranged in a side surface of the honeycomb structure body and a urea spraying device spraying a urea water solution in mist form. The urea water solution sprayed from the urea spraying device is supplied inside cells from a first end face of the honeycomb structure body, and urea in the urea water solution supplied in the cells is heated and hydrolyzed inside the electrically heated honeycomb structure body to generate ammonia. The ammonia is discharged outside the honeycomb structure body from a second end face and injected outside. There is provided a reducing agent injection device that can generate and inject ammonia from a urea solution with less energy.

Abstract: A honeycomb structure of the present invention includes a honeycomb structure body and a pair of electrode member arranged at a side surface of the honeycomb structure body. The honeycomb structure body has an electrical resistivity of 1 to 200 ?cm, and the respective pair of electrode members is formed into a band-like shape extending in a direction in which the cells extend. In a cross section perpendicular to the cell extending direction, one of the electrode members is arranged opposite to another of the electrode members sandwiching a center of the honeycomb structure body. One or more of slits, which being open to a side surface, are formed at the honeycomb structure body. At least the one slit is formed so as not to intersect with a straight line connecting center portions of the respective pair of electrode members in the cross section perpendicular to the cell extending direction.

Abstract: A honeycomb structure includes a honeycomb structure body and a pair of electrode members, an electrical resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrode members is formed into a band-like shape extending in a cell extending direction of the honeycomb structure body, one electrode member is disposed on a side opposite to the other electrode member via a center of the honeycomb structure body, there are formed one or more electrode member slits as slits opened in an electrode member region, there are formed one or more honeycomb structure body slits as slits opened in a honeycomb structure body region, and a depth of at least one of the electrode member slits is deeper than a depth of at least one of the honeycomb structure body slits.

Abstract: A honeycomb structure includes a tubular honeycomb structure body including porous partition walls defining a plurality of cells, and an outer peripheral wall and a pair of electrode parts disposed on a side face of the honeycomb structure body, wherein the honeycomb structure body has electric resistivity of 1 to 200 ?cm, each electrode part has a belt-like shape extending in an extending direction of the cells, each electrode part is placed on an opposite side each other across a center of the honeycomb structure body, the honeycomb structure body includes an inflow-side area that is an area on the inflow-side and covering the inflow end face, and an outflow-side area that is an area other than the inflow-side area, and the inflow-side area is made of a material having electric resistivity lower than electric resistivity of a material of the outflow-side area.

Abstract: There is disclosed a honeycomb structure including a honeycomb structure body, and a pair of electrode members disposed on a side surface of the honeycomb structure body, an electric resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrode members is formed into a band shape extending in a cell extending direction of the honeycomb structure body, and in a cross section orthogonal to the cell extending direction, one electrode member is disposed on a side opposite to the other electrode member via a center of the honeycomb structure body, and in the honeycomb structure body, one or more specific slits each having an open end in the side surface are formed.

Abstract: A honeycomb structure includes a cylindrical honeycomb structure section having porous partition walls to define and form a plurality of cells, and an outer peripheral wall, and a pair of electrode sections disposed on a side surface of the honeycomb structure section. An electrical resistivity of the honeycomb structure section is from 1 to 200 ?cm, and each of the pair of electrode sections is constituted of a laminated body of two or more electrode bodies. An area of the electrode body disposed closest to an outer peripheral wall side is larger than an area of the other electrode body, and in a cross section perpendicular to a cell extending direction, a center angle of the electrode body disposed closest to the outer peripheral wall side is larger than a center angle of the other electrode body.

Abstract: A honeycomb structure includes a tubular honeycomb structure body having porous partition walls to define and form a plurality of cells and an outer peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb structure body. An electrical resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrodes is formed into a band-like shape extending in an extending direction of the cells of the honeycomb structure body, one electrode in the pair of electrodes is disposed on a side opposite to the other electrode in the pair of electrodes via a center of the honeycomb structure body, the honeycomb structure body has a central region and an outer peripheral region, and an electrical resistivity of the central region is lower than an electrical resistivity of the outer peripheral region.

Abstract: A honeycomb structure includes a tubular honeycomb structure body having porous partition walls to define and form a plurality of cells and an outer peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb structure body. An electrical resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrodes is formed into a band-like shape extending in an extending direction of the cells of the honeycomb structure body, one electrode in the pair of electrodes is disposed on a side opposite to the other electrode in the pair of electrodes via a center of the honeycomb structure body, the honeycomb structure body is constituted of an outer peripheral region and a central region, and an electrical resistivity of a material constituting the outer peripheral region is lower than an electrical resistivity of a material constituting the central region.

Abstract: A honeycomb structure includes a tubular bonded honeycomb segment assembly having a plurality of honeycomb segments and a bonding layer which bonds side surfaces of the plurality of honeycomb segments to each other; and a pair of electrode members disposed on a side surface of the bonded honeycomb segment assembly, a volume resistivity of each of the honeycomb segments is from 1 to 200 ?cm, at least a part of the bonding layer is made of a bonding material having a conductivity, a volume resistivity of the bonding layer is from 2 to 2000 ?cm, and each of the pair of electrode members is formed into a band-like shape extending in an extending direction of the cells of the bonded honeycomb segment assembly, and one electrode member is disposed on a side opposite to the other electrode member via a center of the bonded honeycomb segment assembly.

Abstract: A reducing agent injection device includes a honeycomb structure having a honeycomb structure body and a pair of electrode members arranged in a side surface of the honeycomb structure body and a urea spraying device spraying a urea water solution in mist form. The urea water solution sprayed from the urea spraying device is supplied inside cells from a first end face of the honeycomb structure body, and urea in the urea water solution supplied in the cells is heated and hydrolyzed inside the electrically heated honeycomb structure body to generate ammonia. The ammonia is discharged outside the honeycomb structure body from a second end face and injected outside. There is provided a reducing agent injection device that can generate and inject ammonia from a urea solution with less energy.

Abstract: A honeycomb structure includes a honeycomb structure section having porous partition walls, and an outer peripheral wall; and a pair of electrode sections, each of the pair of electrode sections are formed into a band shape, the one electrode section is disposed on an opposite side to the other electrode section via a center O of the honeycomb structure section, a shape of the cells is a quadrangular shape or a hexagonal shape, and in the cross section perpendicular to the extending direction of the cells and including the electrode sections, a straight line parallel to a diagonal line connecting two facing vertexes of the one cell and passing the center of the honeycomb structure section is a reference line L, and each of the electrode sections is disposed at a position to intersect with the at least one reference line L.

Abstract: A honeycomb structure of the present invention includes a honeycomb structure body and a pair of electrode member arranged at a side surface of the honeycomb structure body. The honeycomb structure body has an electrical resistivity of 1 to 200 ?cm, and the respective pair of electrode members is formed into a band-like shape extending in a direction in which the cells extend. In a cross section perpendicular to the cell extending direction, one of the electrode members is arranged opposite to another of the electrode members sandwiching a center of the honeycomb structure body. One or more of slits, which being open to a side surface, are formed at the honeycomb structure body. At least the one slit is formed so as not to intersect with a straight line connecting center portions of the respective pair of electrode members in the cross section perpendicular to the cell extending direction.

Abstract: There are disclosed an information-display-equipped electric-heating-type heater, and a method of using the above information. An information-display-equipped electric-heating-type heater includes a tubular honeycomb structure made of a conductive material and having porous partition walls to define and form a plurality of cells which become through channels for a fluid and extend from one end face to the other end face, and a circumferential wall positioned in an outermost circumference; and a pair of electrodes disposed on the circumferential wall of the honeycomb structure, and information concerning a heater performance of the electric-heating-type heater is displayed in the honeycomb structure.

Abstract: A honeycomb structure includes a tubular honeycomb structure body having porous partition walls to define and form a plurality of cells and an outer peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb structure body. An electrical resistivity of the honeycomb structure body is from 1 to 200 ?cm, each of the pair of electrodes is formed into a band-like shape extending in an extending direction of the cells of the honeycomb structure body, one electrode in the pair of electrodes is disposed on a side opposite to the other electrode in the pair of electrodes via a center of the honeycomb structure body, the honeycomb structure body is constituted of an outer peripheral region and a central region, and an electrical resistivity of a material constituting the outer peripheral region is lower than an electrical resistivity of a material constituting the central region.