EP0312015A2
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EP
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Oxide superconductor shaped body and method of manufacturing the same
Assignee: Furukawa Electric Co Ltd
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Filing: 1988-10-12
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Granted: —
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Expires: 2008-10-12
Abstract
Abstract This invention discloses an oxide superconductor shaped body including a noble metal layer (2) formed on at least one surface of an oxide superconductor layer (3) formed on a substrate (1), and a method of manufacturing oxide superconductor shaped body.
Inventors
- 👤 Shoji Shiga
- 👤 Masanori Ozaki
- 👤 Ton-Chi Chang
- 👤 Nakahiro Furukawadenko-Kanagawa-Ryo Harada
- 👤 Masanao Furukawadenko-Kanagawa-Ryo Mimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 10:10
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; H10N60/203; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0576; H10N60/0632; H10N60/0801; H10N60/80; H10N60/85; H10N60/855; H10N60/857; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/704; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
29 words
An oxide superconductor shaped body including a noble metal layer (2, 4) formed on at least one surface of an oxide superconductor layer (3) formed on a substrate (1).
Claim 2
Dependent Claim
29 words
An oxide superconductor shaped body including a noble metal layer (2, 4) formed on at least one surface of an oxide superconductor layer (3) formed on a substrate (1).
Claim 3
Dependent Claim
49 words
A body according to claim 1, characterized in that the oxide superconductor layer (3) having the noble metal layer (2, 4) formed on at least one surface thereof is so formed on the substrate (1) that the noble metal layer (2, 4) is in contact with the substrate (1).
Claim 4
Dependent Claim
26 words
A body according to claim 1, characterized in that the noble metal layer (2, 4) is formed on both surfaces of the oxide superconductor layer (3).
Claim 5
Dependent Claim
48 words
A body according to claim 1, characterized in that an interlayer (5, 6) consisting of a material selected from the group consisting of a transition metal, an alloy thereof, and an inorganic material is formed between the oxide superconductor layer (3) and the noble metal layer (2, 4).
Claim 6
Dependent Claim
40 words
A body according to claim 4, characterized in that the inorganic material is a material having free energy (ΔG°) equal to or lower than that of BaO and selected from the group consisting of cubic, hexagonal, tetragonal, and rhombic materials.
Claim 7
Dependent Claim
35 words
A body according to claim 4, characterized in that the inorganic material is a material selected from the group consisting of MgO, BeO, BaO, SrO, TiO₂, ZrO₂, HfO₂, BaTiO₃, SrTiO₃, BaZrO₃, SrZrO₃, BaHfO₃, and SrHfO₃.
Claim 8
Dependent Claim
54 words
A body according to claim 1, characterized in that the oxide consists of an oxide represented by formula AB₂Cu₃O x (wherein A represents Y, S, Sc, or a rare earth element, B represents an alkaline earth metal, Cu represents copper, O represents oxygen, and X = 7 δ where 1 ≧ δ ≧ 0).
Claim 9
Dependent Claim
20 words
A body according to claim 1, characterized in that the oxide consists of an oxide represented by Bi₂Sr₂Ca₂Cu₃O x .
Claim 10
Dependent Claim
17 words
A body according to claim 1, characterized in that the oxide superconductor consists of a Cu-containing oxide.
Claim 11
Dependent Claim
36 words
A body according to claim 1, characterized in that the oxide superconductor layer (3) has a thickness of 0.1 to 5 µm, which is 0.005 to 0.5 times the thickness or diameter of the substrate (1).
Claim 12
Dependent Claim
44 words
A body according to claim 4, characterized in that the interlayer (5, 6) has a thickness falling within a range of 0.001 to 0.5 µm, and the noble metal layer (2, 4) has a thickness falling within a range of 0.05 to 3 µm.
Claim 13
Dependent Claim
25 words
A body according to claim 1, characterized in that the noble metal is silver or a silver alloy containing 99 to 55 wt% of silver.
Claim 14
Dependent Claim
32 words
A body according to claim 1, characterized in that the substrate (1) consists of a polycrystalline metal or ceramic having a thermal expansion coefficient of 5 × 10⁻⁶/°C to 15 × 10⁻⁶/°C.
Claim 15
Dependent Claim
21 words
A body according to claim 1, characterized in that the oxide superconductor shaped body has a wire-, strip-, or plate-like shape.
Claim 16
Independent Claim
68 words
A method of manufacturing an oxide superconductor shaped body, comprising the steps of: forming, on a substrate (1), an oxide superconductor layer (3) having a noble metal layer (2, 4) formed on at least one surface of an oxide superconductor layer, directly or with an interlayer (5, 6) formed between the noble metal layer and the oxide superconductor layer; and heat-treating the resultant structure in an oxygencontaining atmosphere.
Claim 17
Independent Claim
68 words
A method of manufacturing an oxide superconductor shaped body, comprising the steps of: forming, on a substrate (1), an oxide superconductor layer (3) having a noble metal layer (2, 4) formed on at least one surface of an oxide superconductor layer, directly or with an interlayer (5, 6) formed between the noble metal layer and the oxide superconductor layer; and heat-treating the resultant structure in an oxygencontaining atmosphere.
Claim 18
Dependent Claim
60 words
A method according to claim 15, characterized in that the interlayer (5, 6) consisting of a layer of a transition metal or an alloy thereof has a thickness of 0.001 to 0.5 µm and the noble metal layer (2, 4) consisting of a layer of a noble metal or an alloy thereof has a thickness of 0.05 to 3 µm.
Claim 19
Dependent Claim
65 words
A method according to claim 15, characterized in that the step of heat-treating the resultant structure comprises the steps of heating the resultant structure in an oxygen-containing atmosphere having an oxygen partial pressure of not less than 0.01 atm at a temperature of not less than 350°C, and cooling the resultant structure to at least 200°C at a cooling rate of not more than 50°C/min.
Claim 20
Dependent Claim
61 words
A method according to claim 15, characterized in that the oxide superconductor layer (3) is formed to satisfy the following inequality under the condition that the substrate (1) comprises a wire and strip: 0.5Y ≧ X ≧ 0.001Y where X is the thickness of the oxide superconductor layer (3), and Y is the diameter or thickness of the wire and strip.
Claim 21
Dependent Claim
39 words
A method according to claim 15, characterized in that the layers formed on the substrate (1) are formed by thin-film forming methods including physical vapor deposition, chemical vapor deposition, plasma spraying, screen printing, spin coating and spray heat decomposition.
References Cited (Backward Citations)
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