US5232908A
Expired / Lapsed
US
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Method of manufacturing an oxide superconductor/metal laminate
Assignee: Furukawa Electric Co Ltd
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Filing: 1992-01-09
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Granted: 1993-08-03
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Expires: 2012-01-09
Abstract
Abstract A method of manufacturing an oxide superconductor including (a) alternately laminating at least one first layer including an oxide superconductor or a precursor thereof with at least one second layer including a metal material to form a laminated body, (b) forming an outermost metal coating layer of the metal material on the laminated body to form a laminated structure, and (c) heating and cooling the laminated structure or elongating the laminated structure into a desired shape and then carrying out heating and cooling.
Inventors
- 👤 Shoji Shiga
- 👤 Naoki Uno
- 👤 Noritsugu Enomoto
- 👤 Hiroyuki Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:16
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; H10N60/203; H10N60/01; H10N60/0268; H10N60/0801; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/702; Y10S505/703; Y10S505/704; Y10S505/725; Y10S505/739; Y10S505/741; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
122 words
A method of manufacturing an oxide superconductor comprising: (a) alternately laminating at least one first layer with at least one second layer, said first layer comprising an oxide superconductor or a precursor thereof and said second layer comprising a first metal material, to form a lamianted body; (b) forming an outermost metal coating layer of said first metal material on the laminated body to form a laminated structure; and (c) heating and cooling the laminated structure or elongating the laminated structure into a desired shape and then carrying out said heating and cooling, wherein during heating the oxide superconductor or the precursor thereof in said laminated structure is partially melted and during cooling the molten oxide superconductor or precursor thereof is recrystallized.
Claim 2
Independent Claim
122 words
A method of manufacturing an oxide superconductor comprising: (a) alternately laminating at least one first layer with at least one second layer, said first layer comprising an oxide superconductor or a precursor thereof and said second layer comprising a first metal material, to form a lamianted body; (b) forming an outermost metal coating layer of said first metal material on the laminated body to form a laminated structure; and (c) heating and cooling the laminated structure or elongating the laminated structure into a desired shape and then carrying out said heating and cooling, wherein during heating the oxide superconductor or the precursor thereof in said laminated structure is partially melted and during cooling the molten oxide superconductor or precursor thereof is recrystallized.
Claim 3
Dependent Claim
60 words
The method according to claim 1, further comprising applying, before or during lamination, (i) a second metal material comprising a high strength, heat-resistant metal material to (ii) the oxide superconductor or the precursor thereof and the first metal material, whereby said second metal comprising the high strength, heat-resistant metal material is embedded continuously in the longitudinal direction of the superconductor.
Claim 4
Dependent Claim
34 words
The method according to claim 2, wherein the high-strength, heat-resistant metal material is a metal selected from the group consisting of Fe-Ni-Cr(SuS) Ni and W and these metals are coated with a noble metal.
Claim 5
Dependent Claim
34 words
The method according to claim 3, wherein the second metal material comprising the high-strength, heat-resistant metal material is coated with a noble metal selected from the group consisting of Au, Pt, Rd and Pd.
Claim 6
Dependent Claim
88 words
The method according to claim 1, wherein the oxide superconductor is a material selected from the group consisting of La 2-x Ba x CuO 4 , La 2-x Sr x CuO 4 , Y(Dy,Er,Ho)Ba 2 Cu 3 O 7 -δ, Bi 2 Sr 2 CaCu 2 O 8 , Bi 2 Sr 2 Ca 2 Cu 3 O 10 , Tl 2 Ba 2 CaCu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , and TlBa 2 CaCu 7 O 8 .5.
Claim 7
Dependent Claim
33 words
The method according to claim 1, wherein the precursor of the oxide superconductor is an intermediate material between a source material which can be converted into an oxide superconductor and the oxide superconductor.
Claim 8
Dependent Claim
43 words
The method according to claim 6, wherein the intermediate material is a material selected from the group consisting of an oxide mixture, a coprecipitation mixture, and an oxygen deficient composite oxide of oxide superconductor constituting elements, and an alloy of said constituting elements.
Claim 9
Dependent Claim
45 words
The method according to claim 1, wherein the metal material is a metal selected from the group consisting of Ag, Ag-Pd, Ag-Au, Ag-Cu, Ag-Mg, Ag-Pt, Ag-Ir, Au, Au-Ni, Au-Cu, Au-Ag-Cu, Au-Pd-Ag, Au-Ir, Pt, Pt-Ir, Pt-Pd, Pd, Pd-Ni,, Pd-Co, Ni-Cr, Ni-Cr-Co, Ni-Fe, Ni-Fe-Co, Fe-Cr and Fe-Ni-CR(SUS).
Claim 10
Dependent Claim
18 words
The method according to claim 1, wherein the laminating results in a concentric form of the laminated body.
Claim 11
Dependent Claim
18 words
The method according to claim 1, wherein the laminating results in a spiral form of the laminated body.
Claim 12
Dependent Claim
18 words
The method according to claim 1, wherein the laminating results in a plate-like form of the laminated body.
Claim 13
Dependent Claim
24 words
The method according to claim 1, wherein the first metal material is nonreactive with the oxide superconductive layers and is electrically and thermally conductive.
Claim 14
Dependent Claim
20 words
The method according to claim 1, wherein the heating is carried out at a temperature of 800° to 1000° C.
Claim 15
Dependent Claim
51 words
The method according to claim 13, wherein the cooling is carried out to crystallize the oxide superconductor, whereby crystallization of the molten oxide superconductor progresses to portions between the at least one first metal material layer, therefore growing lanky crystal particles in the longitudinal direction which are oriented in the C-axis.
Claim 16
Dependent Claim
140 words
The method according to claim 14, wherein said first metal material is selected from the group consisting of Ag, Ag-Pd, Ag-Au, Ag-Cu, Ag-Mg, Ag-Pt, Ag-Ir, Au, Au-Ni, Au-Cu, Au-Ag-Cu, Au-Pd-Ag, Au-Ir, Pt, Pt-Ir, Pt-Pd, Pd, Pd-Ni, Pd-Co, Ni-Cr, Ni-Cr-Co, Ni-Fe, Ni-Fe-Co, Fe-Cr and Fe-Ni-Cr (SUS); said oxide superconductor is a material selected from the group consisting of La 2-x Ba x CuO 4 , La 2-x Sr x CuO 4 , Y(Dy,Er,Ho)Ba 2 Cu 3 O 7- δ, Bi 2 Sr 2 CaCu 2 O 8 , Bi 2 Sr 2 Ca 2 Cu 3 O 10 , Tl 2 Ba 2 CaCu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 and TlBa 2 CaCu 7 O 8 .5 ; and the thickness of each oxide superconductor layer is 1 mm to 0.1 mm.
Claim 17
Dependent Claim
27 words
The method according to claim 1, wherein the oxide superconductor or the precursor thereof is applied on said first metal material layer to form the laminated body.
Claim 18
Dependent Claim
41 words
The method according to claim 1, wherein the layer of the oxide superconductor or the precursor thereof is formed by a method selected from the group consisting of a doctor blade method, an extrusion method, and a screen process printing method.
Claim 19
Dependent Claim
41 words
The method according to claim 1, wherein the oxide superconductor or the precursor thereof and the first metal material are worked into rods or pipes, followed by engaging with each other said rods or pipes for preparation of the laminated body.
Claim 20
Dependent Claim
32 words
The method according to claim 1, wherein the laminated structure is subjected to elongation into a desired shape by a method selected from the group consisting of rolling, extrusion, swaging and drawing.
Claim 21
Dependent Claim
69 words
The method according to claim 1, wherein the laminating is carried out by winding a sheet-like first metal material layer around the oxide superconductor or the precursor thereof in a helical shape so as to partially expose the underlying layer of the oxide superconductor or the precursor thereof, whereby the first metal material layer is continuous in the longitudinal direction and discontinuous in the circumferential direction of the superconductor.
Claim 22
Dependent Claim
39 words
The method according to claim 1, wherein the first metal material is of a porous or net-like structure, whereby the first metal material layer is continuous in the longitudinal direction and discontinuous in the circumferential direction of the superconductor.
Claim 23
Dependent Claim
21 words
The method according to claim 1 wherein the laminated structure is subjected to elongation into a desired shape by groove rolling.
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