Heat-resistant member and method for manufacturing the same
AssigneeNGK Insulators, Ltd.
InventorsYunie Izumi, Yoshimasa Kobayashi
Life of this patent
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Abstract
A heat-resistant member according to the present invention includes a member to be protected and a metal oxide ceramic protective layer which is disposed on part of or all surfaces of the member to be protected and which has a porosity of 0 percent by volume or more and 5 percent by volume or less. This heat-resistant member is produced through the step of forming a protective layer by firing a member to be protected provided with a metal raw material in the air in a temperature range lower than the melting point of an oxide of the metal raw material to form a metal oxide ceramic protective layer having a porosity of 0 percent by volume or more and 5 percent by volume or less on part of or all surfaces of the member to be protected.
Claims13
A heat-resistant member comprising:
- a member to be protected;
- and
- a metal oxide ceramic protective layer which is disposed on part of or all surfaces of the member and which has a porosity of 0 percent by volume or more and 5 percent by volume or less,
- wherein the protective layer contains a first component as a main component made from an oxide of at least one selected from the group consisting of Fe, Cu and Ni, and a second component that contains at least one element selected from the group consisting of Li, Na, K, Ga, Si, Zr, Ti, Sn, Nb, Sb and Ta, and
- wherein the heat-resistant member has an electric resistivity of 0.1 Ωcm or more and 100 Ωcm or less.
A method for manufacturing a heat-resistant member, comprising the step of forming a protective layer by firing a member provided with a metal raw material in the air in a temperature range lower than the melting point of an oxide of the metal raw material to form a metal oxide ceramic protective layer having a porosity of 0 percent by volume or more and 5 percent by volume or less on part of or all surfaces of the member,
- wherein the protective layer contains a first component as a main component made from an oxide of at least one selected from the group consisting of Fe, Cu and Ni, and a second component that contains at least one element selected from the group consisting of Li, Na, K, Ga, Si, Zr, Ti, Sn, Nb, Sb and Ta, and
- wherein the heat-resistant member has an electric resistivity of 0.1 Ωcm or more and 100 Ωcm or less.
Dependencies are inferred from the claim text.