Patent EP0292684A2 successfully refreshed from Google Patents.
EP0292684A2
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EP
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Method of making ceramic superconducting wires
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-04-13
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Granted: —
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Expires: 2008-04-13
Abstract
Abstract A method of making ceramic superconducting wires comprising - a step of performing at least one process including mixing starting materials (such as oxides of the constituent metals or compounds containing the metals an oxidised state), shaping the mixed ceramic superconductor so obtained into a ceramic superconductor body of a predetermined shape, sintering it and subsequently grinding the sintered ceramic superconductor body; - a step of transferring the resulting ceramic superconductor powder (1) to a glass tube (2); - a step of heating the whole glass tube or a local portion of it in a heating and melting device (4) so as to melt the ceramic superconductor powder (1); - a step of spinning the glass tube so as to obtain a ceramic superconducting wire (8). A multiple conductor cable (12) can further be formed when a plurality of said ceramic superconducting wires (8) are bundled and put in a glass tube and subsequently heated and spun. Metal wires can further be bundled with said ceramic superconducting wires (8).
Inventors
- 👤 Akira C/O Yokohama Works Of Urano
- 👤 Kenichi C/O Osaka Works Of Takahashi
- 👤 Kazuya C/O Osaka Works Of Omatsu
- 👤 Masashi C/O Yokohama Works Of Onishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 00:48
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/026; C03B37/027; C03B37/028; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0801; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/739; Y10S505/74; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
A method of the production of a ceramic superconductor filament comprising; a step of performing at least one time of shaping ceramic superconductor material and sintering the shaped ceramic superconductor material and crushing the shaped ceramic superconductor material; a step of filling the sintered ceramic superconductor powder in a glass tube; a step of heating the ceramic superconductor powder with the glass tube; and a step of spinning the heated ceramic superconductor material with the glass tube for producing a ceramic superconductor filament covered by glass.
Claim 2
Independent Claim
86 words
A method of the production of a ceramic superconductor filament comprising; a step of performing at least one time of shaping ceramic superconductor material and sintering the shaped ceramic superconductor material and crushing the shaped ceramic superconductor material; a step of filling the sintered ceramic superconductor powder in a glass tube; a step of heating the ceramic superconductor powder with the glass tube; and a step of spinning the heated ceramic superconductor material with the glass tube for producing a ceramic superconductor filament covered by glass.
Claim 3
Dependent Claim
23 words
The method according to claim 1, wherein the melting step is performed by heating the ceramic superconductor powder with the glass tube locally.
Claim 4
Independent Claim
121 words
A method of the production of a ceramic superconductor filament comprising; a step of performing at least one time of shaping ceramic superconductor material and sintering the shaped ceramic superconductor material and crushing the shaped ceramic superconductor material; a step of filling the sintered ceramic superconductor powder in a glass tube; a step of heating the ceramic superconductor powder with the glass tube; a first spinning step of spinning the heated ceramic superconductor material with the glass tube for producing a ceramic superconductor filament covered by glass; a step of bundling a plurality of strands of the ceramic superconductor filament obtained in the spinning step; and a second spinning step of further spinning the bundled strands of the ceramic superconductor filament.
Claim 5
Independent Claim
121 words
A method of the production of a ceramic superconductor filament comprising; a step of performing at least one time of shaping ceramic superconductor material and sintering the shaped ceramic superconductor material and crushing the shaped ceramic superconductor material; a step of filling the sintered ceramic superconductor powder in a glass tube; a step of heating the ceramic superconductor powder with the glass tube; a first spinning step of spinning the heated ceramic superconductor material with the glass tube for producing a ceramic superconductor filament covered by glass; a step of bundling a plurality of strands of the ceramic superconductor filament obtained in the spinning step; and a second spinning step of further spinning the bundled strands of the ceramic superconductor filament.
Claim 6
Dependent Claim
38 words
A method of the production of a ceramic superconductor filament according to claim 3, wherein further comprises a step of removing the glass layer from the ceramic superconductor filament obtained at the second spinning step by chemical agent.
Claim 7
Dependent Claim
17 words
The method according to claim 4, the chemical agent is hydrofluoric acid aqueous or sodium hydroxide aqueous.
Claim 8
Independent Claim
226 words
A method of the production of a ceramic superconductor filament comprising; a step of performing at least one time of shaping ceramic superconductor material and sintering the shaped ceramic superconductor material and crushing the shaped ceramic superconductor material; a step of filling the sintered ceramic superconductor powder in a glass tube; a step of heating the ceramic superconductor powder with the glass tube; a first spinning step of spinning the heated ceramic superconductor material with the glass tube for producing a ceramic superconductor filament covered by glass; a step of bundling a plurality of the ceramic superconductor filaments obtained in the first spinning step and a plurality of metal filaments each coated with glass layer; a second spinning step for spinning the bundled ceramic superconductor filaments and metal filament to produce a filament which contains the respective ceramic superconductor filaments and metal filaments as strands; a step for removing the glass layer of the ceramic superconductor filament obtained in the second spinning step by chemical agent; and a step of heating the filament without the glass layer at the temperature higher than the melting point of the metal conductor and lower than the melting point of the ceramic superconductor filament so that a ceramic superconductor filament which contains the strands of the ceramic superconductor filaments in the metal layer of a matrix form can be produced.
Claim 9
Independent Claim
226 words
A method of the production of a ceramic superconductor filament comprising; a step of performing at least one time of shaping ceramic superconductor material and sintering the shaped ceramic superconductor material and crushing the shaped ceramic superconductor material; a step of filling the sintered ceramic superconductor powder in a glass tube; a step of heating the ceramic superconductor powder with the glass tube; a first spinning step of spinning the heated ceramic superconductor material with the glass tube for producing a ceramic superconductor filament covered by glass; a step of bundling a plurality of the ceramic superconductor filaments obtained in the first spinning step and a plurality of metal filaments each coated with glass layer; a second spinning step for spinning the bundled ceramic superconductor filaments and metal filament to produce a filament which contains the respective ceramic superconductor filaments and metal filaments as strands; a step for removing the glass layer of the ceramic superconductor filament obtained in the second spinning step by chemical agent; and a step of heating the filament without the glass layer at the temperature higher than the melting point of the metal conductor and lower than the melting point of the ceramic superconductor filament so that a ceramic superconductor filament which contains the strands of the ceramic superconductor filaments in the metal layer of a matrix form can be produced.
Claim 10
Dependent Claim
64 words
The method according to claim 1, wherein said ceramic superconductor material comprises at least one element selected from the elements of Ia, IIa and IIIa groups of the periodic table, at least one element selected from the elements of Ib, IIb, IIIb groups of the periodic table, and at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur.
Claim 11
Dependent Claim
64 words
The method according to claim 3, wherein said ceramic superconductor material comprises at least one element selected from the elements of Ia, IIa and IIIa groups of the periodic table, at least one element selected from the elements of Ib, IIb, IIIb groups of the periodic table, and at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur.
Claim 12
Dependent Claim
64 words
The method according to claim 6, wherein said ceramic superconductor material comprises at least one element selected from the elements of Ia, IIa and IIIa groups of the periodic table, at least one element selected from the elements of Ib, IIb, IIIb groups of the periodic table, and at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur.
Claim 13
Dependent Claim
64 words
The method according to claim 1, wherein said ceramic superconductor material comprises at least one element selected from the elements of Ia, IIa and Vb groups of the periodic table, at least one element selected from the elements of Ib, IIb, IIIb groups of the periodic table, and at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur.
Claim 14
Dependent Claim
64 words
The method according to claim 3, wherein said ceramic superconductor material comprises at least one element selected from the elements of Ia, IIa and Vb groups of the periodic table, at least one element selected from the elements of Ib, IIb, IIIb groups of the periodic table, and at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur.
Claim 15
Dependent Claim
64 words
The method according to claim 6, wherein said ceramic superconductor material comprises at least one element selected from the elements of Ia, IIa and Vb groups of the periodic table, at least one element selected from the elements of Ib, IIb, IIIb groups of the periodic table, and at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine and sulfur.
Claim 16
Dependent Claim
15 words
The method according to claim 1, wherein the ceramic superconductor material further comprises copper oxide.
Claim 17
Dependent Claim
15 words
The method according to claim 3, wherein the ceramic superconductor material further comprises copper oxide.
Claim 18
Dependent Claim
15 words
The method according to claim 6, wherein the ceramic superconductor material further comprises copper oxide.
Claim 19
Dependent Claim
38 words
The method according to claim 1, wherein the ceramic superconductor powder comprises substance selected from Bi Sr Ca Cu₂O Y 0.3 Ba Cu 0.7 O₃ [La Ba]₂ Cu O₄ [La Sr]₂ Cu O₄ and [La Ca]₂ Cu O₄.
References Cited (Backward Citations)
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