EP0285169A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Superconductor and method of manufacturing the same
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1988-03-31
•
Granted: —
•
Expires: 2008-03-31
Abstract
Abstract A method of manufacturing a superconductor is carried out by first preparing a material composed of Y₁Ba₂Cu₃O₇. This material is heated/molten in a platinum crucible. A melt thus obtained is drawn out from a high-temperature frame provided above the platinum crucible and heated to a temperature exceeding the melting point of the material. The melt thus drawn out is cooled by natural standing, to be solidified. As the result, an elongated superconductor composed of Y₁Ba₂Cu₃O₇ can be obtained. This superconductor enters a superconductive state at 90 K.
Inventors
- 👤 Yoshihiro C/O Osaka Works Nakai
- 👤 Kazuo C/O Osaka Works Sawada
- 👤 Kazuhiko C/O Osaka Works Hayashi
- 👤 Masanobu C/O Osaka Works Nishio
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:20
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0296; H10N60/0324; C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4512; C04B35/4521; C04B35/622; C04B35/653; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/733; Y10S505/739; Y10S505/74; Y10S505/741; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
84 words
A method of manufacturing a superconductor made of a ceramics superconductive material, comprising: a step of preparing a raw material of said ceramics superconductive material; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting temperature of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body.
Claim 2
Independent Claim
84 words
A method of manufacturing a superconductor made of a ceramics superconductive material, comprising: a step of preparing a raw material of said ceramics superconductive material; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting temperature of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body.
Claim 3
Dependent Claim
31 words
A method of manufacturing a superconductor in accordance with claim 1, wherein said ceramics superconductive material comprises a layer structure compound containing oxygen and at least two sorts of metal elements.
Claim 4
Dependent Claim
121 words
A method of manufacturing a superconductor in accordance with claim 1, wherein said ceramics superconductive material comprising 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.
Claim 5
Dependent Claim
39 words
A method of manufacturing a superconductor in accordance with claim 3, 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 6
Dependent Claim
25 words
A method of manufacturing a superconductor in accordance with claim 4, wherein said B contains at least copper and said C contains at least oxygen.
Claim 7
Dependent Claim
27 words
A method of manufacturing a superconductor in accordance with claim 1, wherein said solidified body is formed by either a unidirectionally solidified member or a monocrystal body.
Claim 8
Dependent Claim
39 words
A method of manufacturing a superconductor in accordance with claim 1, wherein said vessel and said frame are made of a material selected from a group of platinum, rhodium, iridium, platinum alloy, rhodium alloy, iridium alloy and boride ceramics.
Claim 9
Dependent Claim
87 words
A superconductor made of a ceramics superconductive material, said superconductor being obtained by a method comprising: a step of preparing a raw material of said ceramics superconductive material; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body.
Claim 10
Dependent Claim
87 words
A superconductor made of a ceramics superconductive material, said superconductor being obtained by a method comprising: a step of preparing a raw material of said ceramics superconductive material; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body.
Claim 11
Dependent Claim
27 words
A superconductor in accordance with claim 8, wherein said ceramics superconductive material comprises a layer structure compound containing oxygen and at least two sorts of metal elements.
Claim 12
Dependent Claim
117 words
A superconductor in accordance with claim 8, wherein said ceramics superconductive material comprising 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.
Claim 13
Independent Claim
329 words
A method of manufacturing a superconductor made 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 an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body, at least one of said steps of melting said raw material, drawing out said melt and solidifying said melt being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, said 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
329 words
A method of manufacturing a superconductor made 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 an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body, at least one of said steps of melting said raw material, drawing out said melt and solidifying said melt being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, said 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
25 words
A method of manufacturing a superconductor in accordance with claim 11, wherein said C x and said C y are identical to said C .
Claim 16
Dependent Claim
52 words
A method of manufacturing a superconductor in accordance with claim 11, wherein said melting step comprises a step of adding said C y to said melt, said step being performed 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
53 words
A method of manufacturing a superconductor in accordance with claim 11, wherein said solidifying step comprises a step of adding said C y to said solidified body, said step being performed 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
55 words
A method of manufacturing a superconductor 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 solidifying step to add said C y to said solidified body.
Claim 19
Dependent Claim
328 words
A superconductor made 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 superconductor 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 ratio of C x ; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body, at least one of said steps of melting said raw material, drawing out said melt and solidifying said melt being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, said 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
328 words
A superconductor made 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 superconductor 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 ratio of C x ; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said raw material; and a step of solidifying said drawn-out melt to obtain a solidified body, at least one of said steps of melting said raw material, drawing out said melt and solidifying said melt being performed in an atmosphere containing a C y component of partial pressure being higher than C y partial pressure in the atmospheric air, said 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
254 words
A method of manufacturing a superconductor formed by a base material coated with 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 base material formed by an elongated body and having a major surface; a step of preparing a raw material being in said composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of passing said base material through said melt in a frame portion provided in said opening portion and heated to a temperature exceeding the melting point of said raw material to apply said melt to said base material; a step of drawing out said base material applied with said melt through said frame portion; and a step of solidifying said melt applied to said drawn-out base material to obtain a base material coated with a solidified body.
Claim 22
Independent Claim
254 words
A method of manufacturing a superconductor formed by a base material coated with 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 base material formed by an elongated body and having a major surface; a step of preparing a raw material being in said composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of passing said base material through said melt in a frame portion provided in said opening portion and heated to a temperature exceeding the melting point of said raw material to apply said melt to said base material; a step of drawing out said base material applied with said melt through said frame portion; and a step of solidifying said melt applied to said drawn-out base material to obtain a base material coated with a solidified body.
Claim 23
Dependent Claim
63 words
A method of manufacturing a superconductor in accordance with claim 17, wherein said step of passing said base material through said melt in said frame portion comprises a step of moving said melt to a passage portion provided between said opening portion and said frame portion and heated to a temperature exceeding the melting point of said raw material through said opening portion.
Claim 24
Dependent Claim
255 words
A superconductor formed by a base material coated with 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 superconductor being obtained by a method comprising: a step of preparing a base material formed by an elongated body and having a major surface; a step of preparing a raw material being in said composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of passing said base material through said melt in a frame portion provided in said opening portion and heated to a temperature exceeding the melting point of said raw material to apply said melt to said base material; a step of drawing out said base material applied with said melt through said frame portion; and a step of solidifying said melt applied to said drawn-out base material to obtain a base material coated with a solidified body.
Claim 25
Dependent Claim
255 words
A superconductor formed by a base material coated with 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 superconductor being obtained by a method comprising: a step of preparing a base material formed by an elongated body and having a major surface; a step of preparing a raw material being in said composition expressed in said general formula AaBbCc; a step of melting said raw material in a vessel having an opening portion to obtain a melt; a step of passing said base material through said melt in a frame portion provided in said opening portion and heated to a temperature exceeding the melting point of said raw material to apply said melt to said base material; a step of drawing out said base material applied with said melt through said frame portion; and a step of solidifying said melt applied to said drawn-out base material to obtain a base material coated with a solidified body.
Claim 26
Independent Claim
103 words
A method of manufacturing a superconductor made of a superconductive material of Y-Ba-Cu-O, comprising: a step of preparing a composite oxide of YO 1.5 , BaO and CuO being in a composition region enclosed by a first point showing 100at.%CuO, a second point showing 50at.YO 1.5 - 25 at.%BaO -25at.%CuO and a third point showing 50at.%BaO - 50at.%CuO, excluding a line connecting said first and third points, in a three-component composition diagram of respective oxides of yttrium, barium and copper; a step of melting said composite oxide to obtain a melt; and a step of solidifying said melt to obtain a solidified body.
Claim 27
Independent Claim
103 words
A method of manufacturing a superconductor made of a superconductive material of Y-Ba-Cu-O, comprising: a step of preparing a composite oxide of YO 1.5 , BaO and CuO being in a composition region enclosed by a first point showing 100at.%CuO, a second point showing 50at.YO 1.5 - 25 at.%BaO -25at.%CuO and a third point showing 50at.%BaO - 50at.%CuO, excluding a line connecting said first and third points, in a three-component composition diagram of respective oxides of yttrium, barium and copper; a step of melting said composite oxide to obtain a melt; and a step of solidifying said melt to obtain a solidified body.
Claim 28
Dependent Claim
58 words
A method of manufacturing a superconductor in accordance with claim 20, wherein said composition of YO 1.5 , BaO and CuO is in a region enclosed by a fourth point showing 10at.%YO 1.5 - 20at.%BaO - 70at.%CuO, a fifth point showing 30at.%YO 1.5 - 30at.%BaO - 40at.%CuO and a sixth point showing 5at.%YO 1.5 - 45at.%BaO - 50at.%CuO.
Claim 29
Dependent Claim
28 words
A method of manufacturing a superconductor in accordance with claim 20, wherein said melting step comprises a step of melting said composite oxide in a vessel of platinum.
Claim 30
Dependent Claim
49 words
A method of manufacturing a superconductor in accordance with claim 20, further comprising steps of holding said solidified body in a temperature range of 800 to 1000°C for at least two hours after said solidifying step and cooling the same at a cooling speed of not more than 200°C/h.
Claim 31
Dependent Claim
35 words
A method of manufacturing a superconductor in accordance with claim 23, wherein said steps of holding said solidified body and cooling the same comprise steps performed in an oxygen atmosphere of at least 0.2 atm.
Claim 32
Dependent Claim
32 words
A method of manufacturing a superconductor in accordance with claim 20, wherein said melting step and said solidifying step comprise steps being performed in an oxygen atmosphere of at least 0.2 atm.
Claim 33
Dependent Claim
79 words
A method of manufacturing a superconductor in accordance with claim 20, wherein said melting step and said solidifying step comprise a step of melting said composite oxide in a vessel having an opening portion to obtain a melt, a step of drawing out said melt through a frame provided in said opening portion and heated to a temperature exceeding the melting point of said composite oxide and a step of solidifying said drawn-out melt to obtain a solidified body.
Claim 34
Dependent Claim
97 words
A superconductor made of a superconductive material of Y-Ba-Cu-O, said superconductor being obtained by a method comprising: a step of preparing a composite oxide of YO 1.5 , BaO and CuO being in a composition region enclosed by a first point showing 100at.%CuO, a second point showing 50at.%YO 1.5 - 25at.%BaO - 25at.%CuO and a third point showing 50at.%BaO - 50at.%CuO in a three-component composition diagram of respective oxides of yttrium, barium and copper; a step of melting said composite oxide to obtain a melt; and a step of solidifying said melt to obtain a solidified body.
Claim 35
Dependent Claim
97 words
A superconductor made of a superconductive material of Y-Ba-Cu-O, said superconductor being obtained by a method comprising: a step of preparing a composite oxide of YO 1.5 , BaO and CuO being in a composition region enclosed by a first point showing 100at.%CuO, a second point showing 50at.%YO 1.5 - 25at.%BaO - 25at.%CuO and a third point showing 50at.%BaO - 50at.%CuO in a three-component composition diagram of respective oxides of yttrium, barium and copper; a step of melting said composite oxide to obtain a melt; and a step of solidifying said melt to obtain a solidified body.
Claim 36
Dependent Claim
54 words
A superconductor in accordance with claim 27, wherein said composition of YO 1.5 , BaO and CuO is in a region enclosed by a fourth point showing 10at.%YO 1.5 - 20at.%BaO - 70at.%CuO, a fifth point showing 30at.%YO 1.5 - 30at.%BaO - 40at.%CuO and a sixth point showing 5at.%YO 1.5 - 45at.%BaO - 50at.%CuO.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.