EP0281474A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for manufacturing a compound oxide-type superconducting wire
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-02-29
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Granted: —
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Expires: 2008-02-29
Abstract
Abstract The process includes steps comprising preparing a mass of oxide (1) having superconductivity from powder material, covering the mass of oxide (1) with a metal pipe (2), and then reducing the diameter of the metal pipe containing the oxide material into a wire form by a plastic deformation exerting mainly compressive strain upon the metal pipe (2). The oxide material may be a compound oxide having Perovskite-type crystal structure exhibiting superconductivity. The metal pipe (2) may be made of a metal selected from a group comprising Cu, Al, Nb, V, Mo, Ta, and Ag and of an alloy including these metals as the base. The mass of oxide (1) may be produced by steps including extruding a powder material into a rod shape and then sintering the molded rod at a temperature ranging from 700 to 1,000 °C. The plastic deformation of the metal pipe containing the mass of oxide therein may be carried out by swaging.
Inventors
- 👤 Kazuhiko C/O Osaka Works Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:15
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4508; C04B35/4512; C04B35/4521; C04B35/622; C04B35/64; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0801; H10N60/80; H10N60/85; H10N60/855; H10N60/857; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3213; C04B2235/3215; C04B2235/3224; C04B2235/3225; C04B2235/3227; C04B2235/3298; C04B2235/60; C04B2235/602; C04B2235/6021; C04B2235/65; C04B2235/656; C04B2235/70; C04B2235/74; C04B2235/76; C04B2235/768; C04B2235/94; C04B2235/96; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/739; Y10S505/74; Y10S505/825; Y10S505/917; Y10S505/928; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
64 words
A process for manufacturing a wire made of oxide, characterized by steps comprising preparing a mass of oxide having superconductivity from powder material, covering the mass of oxide with a metal pipe, and then reducing the diameter of the metal pipe containing the mass of oxide therein into a wire form by such plastic deformation that exert mainly compressive strain upon the metal pipe.
Claim 2
Dependent Claim
64 words
A process for manufacturing a wire made of oxide, characterized by steps comprising preparing a mass of oxide having superconductivity from powder material, covering the mass of oxide with a metal pipe, and then reducing the diameter of the metal pipe containing the mass of oxide therein into a wire form by such plastic deformation that exert mainly compressive strain upon the metal pipe.
Claim 3
Dependent Claim
106 words
Process claimed in Claim 1, characterized in that said mass of oxide is a compound having the general formula: (A 1-x B x )₂CO 4-y in which "A" stands for at least one element selected from lanthanide elements of the Periodic Table, "B" stands for at least one element selected from a group comprising Ia, IIa and IIIa elements of the Periodic Table, "C" stands for at least one element selected from a group comprising Ib, IIb, IIIb elements or transition elements of the Periodic, and small letters "x" and "y" are numbers which satisfy O < x < 1, and 0 ≦ y < 4.
Claim 4
Dependent Claim
55 words
Process claimed in Claim 1, characterized in that said mass of oxide is made of a compound having the general formula: LnBa₂Cu₃O₇-* in which "Ln" stands for an element selected from IIIb group elements of the Periodic Table and a symbol of " * " is a number which satisfies O < * ≦ 1.
Claim 5
Dependent Claim
12 words
Process claimed in Claim 3, characterized in that said Ln is Y.
Claim 6
Dependent Claim
14 words
Process claimed in Claim 3, characterized in that said Ln is a lanthanide element.
Claim 7
Dependent Claim
12 words
Process claimed in Claim 5, characterized in that said Ln is Ho.
Claim 8
Dependent Claim
40 words
Process claimed in Claim 1, characterized in that said mass of oxide is made of a compound having the general formula: CaSrBiCu₂O₇-* in which a symbol of " * " is a number which satisfies O < * ≦ 3.
Claim 9
Dependent Claim
39 words
Process claimed in Claim 1, characterized in that said metal pipe is made of a metal selected from a group comprising Cu, Al, Nb, V, Mo, Ta, and Ag and of an alloy including these metals as the base.
Claim 10
Dependent Claim
32 words
Process claimed in Claim 1, characterized in that said mass of oxide is produced by steps comprising extruding a material powder to obtain an molded article and then heat-treating the molded article.
Claim 11
Dependent Claim
22 words
Process claimed in Claim 9, characterized in that said heat-treatment is carried out at a temperature ranging from 700 to 1,000 °C.
Claim 12
Dependent Claim
18 words
Process claimed in Claim 9, characterized in that said extrusion is performed by a friction driving type extruder.
Claim 13
Dependent Claim
15 words
Process claimed in Claim 1, characterized in that said plastic deformation is performed by swaging.
Claim 14
Dependent Claim
13 words
Process claimed in Claim 1, characterized by further heat-treatment after the plastic deformation.
Claim 15
Dependent Claim
74 words
A process for manufacturing a wire made of oxide, characterized by steps comprising molding a powder mixture into a rod shape, heating the molded rod to produce a mass of oxide having superconductivity, covering the mass of oxide with a metal pipe, and then reducing the diameter of the metal pipe containing the mass of oxide therein into a wire form by such plastic deformation that exert mainly compressive strain upon the metal pipe.
Claim 16
Dependent Claim
74 words
A process for manufacturing a wire made of oxide, characterized by steps comprising molding a powder mixture into a rod shape, heating the molded rod to produce a mass of oxide having superconductivity, covering the mass of oxide with a metal pipe, and then reducing the diameter of the metal pipe containing the mass of oxide therein into a wire form by such plastic deformation that exert mainly compressive strain upon the metal pipe.
Claim 17
Dependent Claim
106 words
Process claimed in Claim 14, characterized in that said mass of oxide is a compound having the general formula: (A 1-x B x )₂CO 4-y in which "A" stands for at least one element selected from lanthanide elements of the Periodic Table, "B" stands for at least one element selected from a group comprising Ia, IIa and IIIa elements of the Periodic Table, "C" stands for at least one element selected from a group comprising Ib, IIb, IIIb elements or transition elements of the Periodic, and small letters "x" and "y" are numbers which satisfy O < x < 1, and 0 ≦ y < 4.
Claim 18
Dependent Claim
55 words
Process claimed in Claim 14, characterized in that said mass of oxide is made of a compound having the general formula: LnBa₂Cu₃O₇-* in which "Ln" stands for an element selected from IIIb group elements of the Periodic Table and a symbol of " * " is a number which satisfies O < * ≦ 3.
Claim 19
Dependent Claim
12 words
Process claimed in Claim 16, characterized in that said Ln is Y.
Claim 20
Dependent Claim
14 words
Process claimed in Claim 16, characterized in that said Ln is a lanthanide element.
Claim 21
Dependent Claim
12 words
Process claimed in Claim 18, characterized in that said Ln is Ho.
Claim 22
Dependent Claim
40 words
Process claimed in Claim 14, characterized in that said mass of oxide is made of a compound having the general formula: CaSrBiCu₂O₇-* in which a symbol of " * " is a number which satisfies O < * ≦ 3.
Claim 23
Dependent Claim
39 words
Process claimed in Claim 14, characterized in that said metal pipe is made of a metal selected from a group comprising Cu, Al, Nb, V, Mo, Ta, and Ag and of an aloy including these metals as the base.
Claim 24
Dependent Claim
14 words
Process claimed in Claim 14, characterized in that said molding is performed by extrusion.
Claim 25
Dependent Claim
18 words
Process claimed in Claim 22, characterized in that said extrusion is performed by a friction driving type extruder.
Claim 26
Dependent Claim
22 words
Process claimed in Claim 14, characterized in that the molded article is heated at a temperature ranging from 700 to 1,000 °C.
Claim 27
Dependent Claim
15 words
Process claimed in Claim 14, characterized in that said plastic deformation is performed by swaging.
Claim 28
Dependent Claim
13 words
Process claimed in Claim 14, characterized by further heat-treatment after the plastic deformation.
References Cited (Backward Citations)
No citation records indexed.
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