Conductive honeycomb structure

Patent metadata

Field	Value
Publication number	US-10773207-B2
Application number	US-201815938198-A
Country	US
Kind code	B2
Filing date	Mar 28, 2018
Priority date	Mar 31, 2017
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A conductive honeycomb structure, comprising: a columnar ceramic honeycomb structure portion comprising an outer peripheral side wall and partition walls each disposed inside the outer peripheral side wall and defining a plurality of cells penetrating from one bottom surface to another bottom surface to form flow paths; a pair of electrode layers disposed on an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and a pair of metal terminals joined to the respective electrode layers via one or more welded portions, wherein each of the one or more welded portions comprises a welded area of from 2 to 50 mm 2 .

First claim

What is claimed is:

1. A conductive honeycomb structure, comprising:
a columnar ceramic honeycomb structure portion comprising an outer peripheral side wall and a plurality of partition walls each disposed inside the outer peripheral side wall and defining a plurality of cells penetrating from one bottom surface to another bottom surface to form flow paths;
a pair of electrode layers disposed on an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and
a pair of metal terminals joined to the respective electrode layers via one or more welded portions,
wherein each of the one or more welded portions comprises a welded area of from 2 to 50 mm 2 .

2. The conductive honeycomb structure according to claim 1 , wherein when two or more welded portions are present for each metal terminal, a relationship of P≥{(A 1 +A 2 )/2}/10 is satisfied, in which A 1 and A 2 each represents the welded area of the welded portions adjacent to each other, and P represents a distance between the welded portions adjacent to each other.

3. The conductive honeycomb structure according to claim 1 , wherein a total welded area of the one or more welded portions is 2 mm 2 or more and 120 mm 2 or less for each of the metal terminals.

4. The conductive honeycomb structure according to claim 1 , wherein each electrode layer comprises a stacked structure comprising a first electrode layer that is in contact with the outer surface of the outer peripheral side wall of the honeycomb structure portion, and a second electrode layer that is in contact with one of the metal terminals, the second electrode layer being a stress relaxation layer.

5. The conductive honeycomb structure according to claim 4 , wherein a relational expression of A<B<C is satisfied, in which A represents a coefficient of thermal expansion of the first electrode layer, B represents a coefficient of thermal expansion of the second electrode layer and C represents a coefficient of thermal expansion of the one of the metal terminals.

6. The conductive honeycomb structure according to claim 4 , wherein the second electrode layer has a Young's modulus of from 2 to 50 GPa.

Assignees

• Ngk Insulators Ltd

Inventors

• Noro Takashi

Classifications

• B01J35/57

  Honeycombs · CPC title

• F01N3/2828

  Ceramic multi-channel monoliths, e.g. honeycombs · CPC title

• C04B2237/08

  Non-oxidic interlayers · CPC title

• C04B2235/428

  Silicon · CPC title

• C04B2235/3891

  Silicides, e.g. molybdenum disilicide, iron silicide · CPC title