EP0285168A2
Expired / Lapsed
EP
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Superconducting wire and method of manufacturing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-03-31
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Granted: —
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Expires: 2008-03-31
Abstract
Abstract A method of manufacturing a superconducting wire is carried out by first preparing a material being composed of Y₁Ba₂Cu₃O₇. This material is heated/molten in a platinum crucible. A melt thus obtained is drawn out from a hole provided on the bottom wall of the crucible to be linearly discharged. The linearly discharged melt is cooled to be solidified. A cooling/solidifying space for such a step is set at a temperature level lower by about 10°C than the solidifying point of the material, and a slow-cooling zone is provided next to the cooling/solidifying space. This slow-cooling zone is provided to be at a relatively high temperature in a portion closer to the hole while having a temperature gradient along a direction for linearly discharging the melt. A superconducting wire being composed of Y₁Ba₂Cu₃O₇ is thus obtained. This superconducting wire superconducts at 85 K.
Inventors
- 👤 Nishio C/O Osaka Works Masanobu
- 👤 Hayashi C/O Osaka Works Kazuhiko
- 👤 Nakai C/O Osaka Works Yoshihiro
- 👤 Ohkura C/O Osaka Works Kengo
- 👤 Sawada C/O Osaka Works Kazuo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 13:04
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0801; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/725; Y10S505/733; Y10S505/739; Y10S505/74; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
80 words
A method of manufacturing a superconducting wire composed of a ceramics superconductive material, comprising: a step of preparing a raw material for said ceramics superconductive material; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body.
Claim 2
Independent Claim
80 words
A method of manufacturing a superconducting wire composed of a ceramics superconductive material, comprising: a step of preparing a raw material for said ceramics superconductive material; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body.
Claim 3
Dependent Claim
35 words
A method of manufacturing a superconducting wire in accordance with claim 1, wherein said ceramics superconductive material comprises a compound containing oxygen and at least two sorts of metal elements and being in layer structure.
Claim 4
Dependent Claim
62 words
A method of manufacturing a superconducting wire in accordance with claim 2, wherein said step of melting said raw material to obtain a melt includes a step of adding at least a single sort of vitrifying compound selected from a group of B₂O₃, GeO₂ and P₂O₅ to said material in said vessel thereby to obtain a melt in a viscous glassy state.
Claim 5
Dependent Claim
25 words
A method of manufacturing a superconducting wire in accordance with claim 3, further comprising a step of re-heating said solidified body to crystallize the same.
Claim 6
Dependent Claim
120 words
A method of manufacturing a superconducting wire in accordance with claim 1, wherein said ceramics superconductive material is in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively.
Claim 7
Dependent Claim
40 words
A method of manufacturing a superconducting wire in accordance with claim 5, wherein said A contains at least two sorts of elements selected from said group of those belonging to the groups Ia, IIa and IIIa of the periodic table.
Claim 8
Dependent Claim
26 words
A method of manufacturing a superconducting wire in accordance with claim 5, wherein said B contains at least copper and said C contains at least oxygen.
Claim 9
Dependent Claim
82 words
A superconducting fine wire composed of a ceramics superconductive material, being obtained by a method comprising: a step of preparing a raw material for said ceramics superconductive material; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body.
Claim 10
Dependent Claim
82 words
A superconducting fine wire composed of a ceramics superconductive material, being obtained by a method comprising: a step of preparing a raw material for said ceramics superconductive material; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body.
Claim 11
Dependent Claim
32 words
A superconducting fine wire in accordance with claim 8, wherein said ceramics superconductive material comprises a compound containing oxygen and at least two sorts of metal elements and being in layer structure.
Claim 12
Dependent Claim
117 words
A superconducting fine wire in accordance with claim 8, wherein said ceramics superconductive material is in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively.
Claim 13
Independent Claim
324 words
A method of manufacturing a superconducting wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said method comprising: a step of preparing a raw material being in composition generally expressed in a formula AaBbC x c x , where C x represents at least a single sort of element selected from said group of oxygen, carbon, nitrogen, fluorine and sulfur and c x represents a number showing the composition ratio of C x ; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body, at least one of said melting step, said step of discharging said melt and said cooling and solidifying step being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, C y being prepared by a gas containing at least a single sort of element selected from said group of oxygen, nitrogen, carbon, fluorine and sulfur and at least containing an element left by eliminating said C x from said C if said C consists of two or more sorts of elements.
Claim 14
Independent Claim
324 words
A method of manufacturing a superconducting wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said method comprising: a step of preparing a raw material being in composition generally expressed in a formula AaBbC x c x , where C x represents at least a single sort of element selected from said group of oxygen, carbon, nitrogen, fluorine and sulfur and c x represents a number showing the composition ratio of C x ; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body, at least one of said melting step, said step of discharging said melt and said cooling and solidifying step being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, C y being prepared by a gas containing at least a single sort of element selected from said group of oxygen, nitrogen, carbon, fluorine and sulfur and at least containing an element left by eliminating said C x from said C if said C consists of two or more sorts of elements.
Claim 15
Dependent Claim
26 words
A method of manufacturing a superconducting wire in accordance with claim 11, wherein said C x and said C y are identical to said C .
Claim 16
Dependent Claim
49 words
A method of manufacturing a superconducting wire in accordance with claim 11, wherein said melting step comprises a step of adding said C y to said melt in an atmosphere containing said C y component of partial pressure being higher than C y partial pressure in the atmospheric air.
Claim 17
Dependent Claim
49 words
A method of manufacturing a superconducting wire in accordance with claim 11, wherein said cooling and solidifying step comprises a step of cooling and solidifying said melt in an atmosphere containing said C y component of partial pressure being higher than C y partial pressure in the atmospheric air.
Claim 18
Dependent Claim
49 words
A method of manufacturing a superconducting wire in accordance with claim 11, further comprising a step of re-heating said solidified body in an atmosphere containing said C y component of partial pressure being higher than C y partial pressure in the atmospheric air after said cooling and solidifying step.
Claim 19
Dependent Claim
320 words
A superconducting fine wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said superconducting fine wire being obtained by a method comprising: a step of preparing a raw material being in composition generally expressed in a formula AaBbC x c x , where C x represents at least a single sort of element selected from said group of oxygen, carbon, nitrogen, fluorine and sulfur and c x represents a number showing the composition of C x ; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt, at least one of said melting step, said step of discharging said melt and said cooling and solidifying step being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, C y being prepared by a gas containing at least a single sort of element selected from said group of oxygen, nitrogen, carbon, fluorine and sulfur and at least containing an element left by eliminating said C x from said C if said C consists of two or more elements.
Claim 20
Dependent Claim
320 words
A superconducting fine wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said superconducting fine wire being obtained by a method comprising: a step of preparing a raw material being in composition generally expressed in a formula AaBbC x c x , where C x represents at least a single sort of element selected from said group of oxygen, carbon, nitrogen, fluorine and sulfur and c x represents a number showing the composition of C x ; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt, at least one of said melting step, said step of discharging said melt and said cooling and solidifying step being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, C y being prepared by a gas containing at least a single sort of element selected from said group of oxygen, nitrogen, carbon, fluorine and sulfur and at least containing an element left by eliminating said C x from said C if said C consists of two or more elements.
Claim 21
Independent Claim
220 words
A method of manufacturing a superconducting wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said method comprising: a step of preparing a raw material being in composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body, said cooling and solidifying step being performed in a space of a temperature level between the solidifying point of said raw material and that lower by 100°C than said solidifying point.
Claim 22
Independent Claim
220 words
A method of manufacturing a superconducting wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said method comprising: a step of preparing a raw material being in composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having a hole provided to communicate with its interior to obtain a melt; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body, said cooling and solidifying step being performed in a space of a temperature level between the solidifying point of said raw material and that lower by 100°C than said solidifying point.
Claim 23
Dependent Claim
47 words
A method of manufacturing a superconducting wire in accordance with claim 17, wherein said cooling and solidifying step comprises a step of cooling and solidifying said melt in a space of a temperature level between said solidifying point and that lower by 50°C than said solidifying point.
Claim 24
Dependent Claim
75 words
A method of manufacturing a superconducting wire in accordance with claim 17, wherein a zone next to said space for performing said cooling and solidifying step is provided to be at a relatively high temperature in a portion closer to said hole while having a temperature gradient along a direction for linearly discharging said melt, said method further comprising a step of passing said solidified body through said zone thereby to slowly cool the same.
Claim 25
Dependent Claim
220 words
A superconducting fine wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said superconducting fine wire being obtained by a method comprising: a step of preparing a raw material being in composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having a hole provided to communicate with its interior; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body, said cooling and solidifying step being performed in a space of a temperature level between the solidifying point of said raw material and that lower by 100°C than said solidifying point.
Claim 26
Dependent Claim
220 words
A superconducting fine wire composed of a ceramics superconductive material being in composition generally expressed in a formula AaBbCc, where A represents at least a single sort of element selected from a group of those belonging to the groups Ia, IIa and IIIa of the periodic table, B represents at least a single sort of element selected from a group of those belonging to the groups Ib, IIb and IIIb of the periodic table, C represents at least a single sort of element selected from a group of oxygen, carbon, nitrogen, fluorine and sulfur and a , b and c represent numbers showing the composition ratio of A , B and C respectively, said superconducting fine wire being obtained by a method comprising: a step of preparing a raw material being in composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having a hole provided to communicate with its interior; a step of linearly discharging said melt from said hole by either extrusion or drawout; and a step of cooling and solidifying said linearly discharged melt to obtain a solidified body, said cooling and solidifying step being performed in a space of a temperature level between the solidifying point of said raw material and that lower by 100°C than said solidifying point.
References Cited (Backward Citations)
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