Honeycomb structure

Patent metadata

Field	Value
Publication number	US-9835063-B2
Application number	US-201514627134-A
Country	US
Kind code	B2
Filing date	Feb 20, 2015
Priority date	Mar 13, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The honeycomb structure includes a honeycomb structure body and a pair of electrode members disposed on a side surface of the honeycomb structure body, each of the pair of electrode members is shaped in the form of a band extending in a cell extending direction, and in a cross section perpendicular to the extending direction of cells, one electrode member is disposed on a side opposite to the other electrode member via a center of the honeycomb structure body, one or more slits opened in the side surface are formed in the honeycomb structure body, the honeycomb structure body has a charging material charged into the at least one slit, the charging material contains aggregates and a neck material, and a ratio (α 2/α1 ) of a thermal expansion coefficient α 2 of the charging material to a thermal expansion coefficient α 1 of the honeycomb structure body is from 0.6 to 1.5.

First claim

What is claimed is:

1. A honeycomb structure comprising:
a pillar honeycomb structure body having porous partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, and a circumferential wall positioned at an outermost circumference; and
a pair of electrode members disposed on a side surface of the honeycomb structure body,
wherein the honeycomb structure body heats by energization,
each of the pair of electrode members is shaped in the form of a band extending in an extending direction of the cells of the honeycomb structure body,
in a cross section perpendicular to the extending direction of the cells, one electrode member in the pair of electrode members is disposed on a side opposite to the other electrode member in the pair of electrode members via a center of the honeycomb structure body,
one or more slits opened in the side surface are formed in the honeycomb structure body,
the honeycomb structure body has a charging material charged into the at least one slit, the charging material is disposed in at least a part of a space of the slit,
the charging material contains aggregates and a neck material, and
a ratio (α 2 /α 1 ) of a thermal expansion coefficient α 2 of the charging material at 25 to 800° C. to a thermal expansion coefficient α 1 of the honeycomb structure body at 25 to 800° C. is from 0.6 to 1.5.

2. The honeycomb structure according to claim 1 ,
wherein a strength of the charging material is 500 kPa or more and Young's modulus of the charging material is 1500 MPa or less.

3. The honeycomb structure according to claim 1 ,
wherein a porosity of the charging material is from 20 to 90%.

4. The honeycomb structure according to claim 2 ,
wherein a porosity of the charging material is from 20 to 90%.

5. The honeycomb structure according to claim 1 ,
wherein the charging material contains 2 to 90 mass % of the neck material.

6. The honeycomb structure according to claim 2 ,
wherein the charging material contains 2 to 90 mass % of the neck material.

7. The honeycomb structure according to claim 3 ,
wherein the charging material contains 2 to 90 mass % of the neck material.

8. The honeycomb structure according to claim 4 ,
wherein the charging material contains 2 to 90 mass % of the neck material.

9. The honeycomb structure according to claim 1 ,
wherein the charging material contains the aggregates including silicon carbide and a content of the aggregates including silicon carbide in the charging material is 90 mass % or less.

10. The honeycomb structure according to claim 9 ,
wherein an average particle diameter of the aggregates including silicon carbide is 300 μm or less.

11. The honeycomb structure according to claim 1 ,
wherein the charging material contains the aggregates including cordierite.

12. The honeycomb structure according to claim 11 ,
wherein an average particle diameter of the aggregates including cordierite is 300 μm or less.

13. The honeycomb structure according to claim 1 ,
wherein the charging material contains the aggregates including silicon oxide and a content of the aggregates including silicon oxide in the charging material is 80 mass % or less.

14. The honeycomb structure according to claim 13 ,
wherein an average particle diameter of the aggregates including silicon oxide is 300 μm or less.

15. The honeycomb structure according to claim 1 ,
wherein an electrical resistivity of the honeycomb structure body is from 1 to 200 Ωcm.

Assignees

• Ngk Insulators Ltd

Inventors

• Hosoi Yusuke
• Watanabe Tsuyoshi
• Inoue Takayuki

Classifications

• C04B2235/5436

  micrometer sized, i.e. from 1 to 100 micron · CPC title

• F01N3/0222 Primary

  the structure being monolithic, e.g. honeycombs · CPC title

• C04B35/565

  based on silicon carbide · CPC title

• C04B2235/6021

  Extrusion moulding · CPC title

• C04B2235/5427

  millimeter or submillimeter sized, i.e. larger than 0,1 mm · CPC title