Composite body, honeycomb structure, and method for producing composite body

Patent metadata

Field	Value
Publication number	US-2016271908-A1
Application number	US-201615071324-A
Country	US
Kind code	A1
Filing date	Mar 16, 2016
Priority date	Mar 20, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A composite body of the present invention includes a base and an oxide layer arranged on the base, the oxide layer containing more than 45% by volume of a perovskite-type oxide phase. The composite body may include a first member, a second member, and a joining portion that joins the first member and the second member, at least one of the first member and the second member serving as the base, and the joining portion serving as the oxide layer. The composite body may include the base and a covering portion that covers the whole or part of a surface of the base, the covering portion being formed of the oxide layer.

First claim

What is claimed is:

1 . A composite body comprising:
a base; and an oxide layer arranged on the base, the oxide layer containing more than 45% by volume of a perovskite-type oxide phase.

2 . The composite body according to claim 1 , wherein the composite body includes:
a first member, a second member, and a joining portion that joins the first member and the second member, wherein at least one of the first member and the second member serves as the base, and the joining portion serves as the oxide layer.

3 . The composite body according to claim 2 , wherein at least one of part of a surface of the joining portion adjacent to the first member and part of a surface of the joining portion adjacent to the second member is exposed.

4 . The composite body according to claim 1 , wherein the composite body includes:
the base, a covering portion that covers the whole or part of a surface of the base, wherein the covering portion is formed of the oxide layer.

5 . The composite body according to claim 1 , wherein the perovskite-type oxide phase is composed of at least one of an oxide containing La and Cu and an oxide containing Sr and Fe.

6 . The composite body according to claim 1 , wherein the perovskite-type oxide phase is composed of at least one of La 2 CuO 4 and SrFeO 3 .

7 . The composite body according to claim 1 , wherein the oxide layer is composed of a single-phase perovskite-type oxide.

8 . The composite body according to claim 1 , wherein the base is composed of at least one of a ceramic containing Si and an alloy containing Fe.

9 . The composite body according to claim 1 , wherein the oxide layer has an electrical conductivity of 0.1 S/cm or more.

10 . The composite body according to claim 1 , wherein the adhesion strength of the base to the oxide layer is 3.0 MPa or more.

11 . The composite body according to claim 2 , wherein the perovskite-type oxide phase is composed of at least one of La 2 CuO 4 and SrFeO 3 .

12 . The composite body according to claim 11 , wherein the base is composed of at least one of a ceramic containing Si and an alloy containing Fe.

13 . A honeycomb structure comprising the composite body according to claim 1 .

14 . A honeycomb structure comprising the composite body according to claim 12 .

15 . A method for producing a composite body, comprising a step of:
firing a laminate including an oxide layer raw material arranged on a base to form an oxide layer on the base, the oxide layer containing more than 45% by volume of a perovskite-type oxide phase.

16 . The method for producing a composite body according to claim 15 , wherein the method includes a step of firing a laminate including a joining portion raw material arranged between a first member and a second member to form a joining portion that joins the first member and the second member,
wherein the base is used as at least one of the first member and the second member, and the oxide layer raw material is used as the joining portion raw material.

17 . The method for producing a composite body according to claim 15 , wherein the method includes a step of firing a laminate including a covering portion raw material arranged on a surface of the base to form a covering portion that covers the whole or part of the surface of the base,
wherein the oxide layer raw material is used as the covering portion raw material.

18 . The method for producing a composite body according to claim 15 , wherein the oxide layer raw material contains a metal powder and a compound powder.

19 . The method for producing a composite body according to claim 18 , wherein the compound powder is one or more selected from the group consisting of oxide powders, carbonate powders, hydroxide powders, and chloride powders.

20 . The method for producing a composite body according to claim 18 , wherein the oxide layer raw material contains the metal powder composed of Cu and the compound powder composed of La(OH) 3 or contains the metal powder composed of Fe and the compound powder composed of SrCO 3 .

Assignees

• Ngk Insulators Ltd

Inventors

• Izumi Yunie
• Kobayashi Yoshimasa

Classifications

• C04B38/0006

  Honeycomb structures (from one or more corrugated sheets by winding or stacking C04B38/0083) · CPC title

• C04B2235/3274

  Ferrites · CPC title

• C04B2235/3215

  Barium oxides or oxide-forming salts thereof · CPC title

• B32B9/005 Primary

  comprising one layer of ceramic material, e.g. porcelain, ceramic tile (layered products with at least two ceramic layers composed mainly of ceramic B32B18/00) · CPC title

• C04B35/01

  based on oxide ceramics · CPC title