WO2007094146A1 - 超電導薄膜材料の製造方法、超電導機器、および超電導薄膜材料 - Google Patents
超電導薄膜材料の製造方法、超電導機器、および超電導薄膜材料 Download PDFInfo
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- WO2007094146A1 WO2007094146A1 PCT/JP2007/050592 JP2007050592W WO2007094146A1 WO 2007094146 A1 WO2007094146 A1 WO 2007094146A1 JP 2007050592 W JP2007050592 W JP 2007050592W WO 2007094146 A1 WO2007094146 A1 WO 2007094146A1
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- 239000000463 material Substances 0.000 title claims abstract description 121
- 239000010409 thin film Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 101
- 239000007791 liquid phase Substances 0.000 claims abstract description 76
- 239000012808 vapor phase Substances 0.000 claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 claims description 46
- 239000000758 substrate Substances 0.000 claims description 33
- 238000001947 vapour-phase growth Methods 0.000 claims description 31
- 239000012071 phase Substances 0.000 claims description 6
- 239000013078 crystal Substances 0.000 abstract description 24
- 229910052751 metal Inorganic materials 0.000 abstract description 24
- 239000002184 metal Substances 0.000 abstract description 24
- 239000000203 mixture Substances 0.000 abstract description 16
- 239000011435 rock Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 abstract 6
- 239000011229 interlayer Substances 0.000 abstract 2
- 239000010408 film Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 18
- 238000007740 vapor deposition Methods 0.000 description 10
- 230000007423 decrease Effects 0.000 description 7
- 230000003746 surface roughness Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- 239000002887 superconductor Substances 0.000 description 5
- 229910052797 bismuth Inorganic materials 0.000 description 4
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- UZLYXNNZYFBAQO-UHFFFAOYSA-N oxygen(2-);ytterbium(3+) Chemical compound [O-2].[O-2].[O-2].[Yb+3].[Yb+3] UZLYXNNZYFBAQO-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910003454 ytterbium oxide Inorganic materials 0.000 description 1
- 229940075624 ytterbium oxide Drugs 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0296—Processes for depositing or forming copper oxide superconductor layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B19/00—Liquid-phase epitaxial-layer growth
- C30B19/02—Liquid-phase epitaxial-layer growth using molten solvents, e.g. flux
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B23/00—Single-crystal growth by condensing evaporated or sublimed materials
- C30B23/02—Epitaxial-layer growth
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
- C30B29/225—Complex oxides based on rare earth copper oxides, e.g. high T-superconductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/06—Films or wires on bases or cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0296—Processes for depositing or forming copper oxide superconductor layers
- H10N60/0324—Processes for depositing or forming copper oxide superconductor layers from a solution
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0296—Processes for depositing or forming copper oxide superconductor layers
- H10N60/0521—Processes for depositing or forming copper oxide superconductor layers by pulsed laser deposition, e.g. laser sputtering
Definitions
- the present invention relates to a method for manufacturing a superconducting thin film material, a superconducting device, and a superconducting thin film material, and more specifically, a method for manufacturing a superconducting thin film material having a RE123-based composition, a superconducting device, and a superconducting thin film Regarding materials.
- RE123-based superconducting wire has the advantage that the critical current density at liquid nitrogen temperature (77. 3K) is higher than that of bismuth-based superconducting wire. It also has the advantage of high critical current values at low temperatures and constant magnetic fields. For this reason, RE123-based superconducting wire is expected as the next-generation high-temperature superconducting wire.
- RE123-based superconductors cannot be covered with a silver sheath like bismuth-based superconductors. It is manufactured by a method of forming a superconducting thin film material.
- Patent Document 1 a laser deposition method (PLD method) is used to form an intermediate layer on a metal tape substrate, and then a PLD method is used to form a first superconducting layer having a RE 123-based composition.
- PLD method laser deposition method
- a technique for forming a second superconducting layer on the first superconducting layer using the laser deposition method and forming the second superconducting layer on the first superconducting layer is disclosed.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-323822
- the method of forming a superconducting thin film material on an oriented metal substrate only by a liquid phase method has a problem that the superconducting thin film material is difficult to grow.
- an object of the present invention is to provide a method of manufacturing a superconducting thin film material, a superconducting device, and a superconducting thin film material that can improve the critical current density and the critical current value.
- another object of the present invention is to provide a superconducting thin film material manufacturing method, a superconducting device, and a superconducting thin film material, in which the superconducting thin film material is easy to grow crystals.
- a method for producing a superconducting thin film material includes a vapor phase process for forming a vapor phase grown superconducting layer by a vapor phase method, and a liquid phase method for contacting the vapor phase grown superconducting layer. And a liquid phase process for forming a phase grown superconducting layer.
- a method for producing a superconducting thin film material includes a vapor phase growth superconducting layer formed by a vapor phase method n (n is an integer of 2 or more) gas phase steps, and a liquid phase method. Liquid phase growth n times of the liquid phase process for forming the superconducting layer.
- the first vapor phase growth superconducting layer is formed in the first vapor phase step among the n times of the vapor phase step, and the first vapor phase growth superconducting layer is formed in the first liquid phase step among the n times of the liquid phase step.
- the first liquid phase growth superconducting layer is formed so as to be in contact.
- the kth vapor phase growth superconducting layer is in contact with the k-1 liquid phase growth superconducting layer during the kth (k is an integer satisfying n ⁇ k ⁇ 2) vapor phase step among the n vapor phase steps. And the k-th liquid phase growth superconducting layer is formed so as to be in contact with the k-th vapor phase growth superconducting layer in the n-th liquid phase step.
- the inventors of the present application have important factors such as the smoothness of the surface of the superconducting thin film material and the crystal denseness of the superconducting thin film material.
- the smoothness of the surface of the superconducting thin film material As the film thickness increases, the temperature of the surface on which the film is formed decreases, and as a result, a phenomenon in which a-axis oriented grains increase is observed. For this reason, the conventional superconducting thin film material formed only by the vapor phase method does not have a large thickness. As a result, the surface smoothness deteriorates.
- a vapor phase growth superconducting layer is formed by a vapor phase method, and a liquid phase growth superconducting layer is formed by a liquid phase method so as to be in contact with the vapor phase growth superconducting layer. Is formed.
- liquid phase growth superconducting layer is formed, liquid enters the irregularities on the surface of the vapor phase growth superconducting layer, and crystal growth of the liquid phase growth superconducting layer occurs with the surface of the vapor phase growth superconducting layer as the nucleus. Therefore, the unevenness on the surface of the vapor-grown superconducting layer is smoothed.
- the superconducting thin film material is composed of both the vapor phase grown superconducting layer and the liquid phase grown superconducting layer
- the superconducting thin film material is composed of only one of the vapor phase grown superconducting layer and the liquid phase grown superconducting layer.
- the vapor phase growth superconducting layer and the liquid phase growth superconducting layer can be made thinner.
- the irregularities on the surface of the superconducting thin film material are smoothed, and a decrease in the crystal density of the superconducting thin film material can be suppressed.
- the thickness of the superconducting thin film material can be increased with the surface smoothness of the superconducting thin film material and the fineness of the crystal of the superconducting thin film material being good. Can be suppressed, and the critical current density and critical current value can be improved.
- a superconducting thin film material is manufactured by alternately forming a vapor phase grown superconducting layer and a liquid phase grown superconducting layer multiple times. Therefore, the total thickness of the superconducting layer can be increased while the thicknesses of the vapor phase growth superconducting layer and the liquid phase growth superconducting layer are thin. As a result, the critical current value can be further increased.
- a vapor phase growth superconducting layer is formed on the surface side of the substrate in the vapor phase process.
- the superconducting thin film material can be formed on both surfaces of the substrate, the current path of the superconducting wire can be increased, and the critical current density and the critical current value can be further improved.
- a vapor phase growth superconducting layer is formed on the surface side of the substrate in the gas phase process.
- a step of forming an intermediate layer between the vapor-grown superconducting layer and the substrate is further provided.
- the substrate is made of metal, and the intermediate layer is made of an oxide having a crystal structure of either rock type, perovskite type, or neurochlore type, and a vapor phase growth superconducting layer and liquid phase growth superconductivity. All the layers have a RE 123-based composition.
- the first vapor phase growth superconducting layer is preferably formed on the surface side of the substrate in the first gas phase step.
- First vapor phase growth The method further includes the step of forming an intermediate layer between the superconducting layer and the substrate.
- the substrate is made of metal, and the intermediate layer is made of an oxide having a rock-type, perovskite-type, or pyrochlore-type crystal structure, and the first to n-th vapor phase growth super
- the conductive layer and the 1st to n-th liquid phase growth superconducting layers all have a RE123-based composition.
- the method for manufacturing a superconducting thin film material according to one aspect of the present invention further includes a step of forming a superconducting layer in contact with the liquid phase growth superconducting layer after the liquid phase process.
- a step of forming a superconducting layer so as to be in contact with the nth liquid phase growth superconducting layer is further provided.
- the superconducting layer grown by the liquid phase method has superior surface smoothness compared to the superconducting layer grown by the vapor phase method, the superconducting layer is formed on the superconducting layer having excellent surface smoothness. Can be formed.
- the vapor phase method is a deviation from the laser vapor deposition method, the sputtering method, or the electron beam vapor deposition method.
- the liquid phase method is an organic metal deposition method (MOD method).
- the superconducting device of the present invention uses a superconducting thin film material produced by the above-described method for producing a superconducting thin film material.
- the critical current density and the critical current value can be improved.
- the superconducting thin film material of the present invention is a superconducting thin film material comprising a first superconducting layer and a second superconducting layer formed so as to be in contact with the first superconducting layer, and has a critical current value of 110 (A / cm width).
- RE123 system means that 0.7 ⁇ x in RE Ba Cu O.
- RE123-based RE means a material containing at least one of a rare earth element and an yttrium element.
- rare earth elements include neodymium (Nd), gadolinium (Gd), formium (Ho), samarium (Sm), and the like.
- the critical current density and the critical current value can be improved.
- FIG. 1 is a partial cross-sectional perspective view schematically showing a configuration of a superconducting thin film material in Embodiment 1 of the present invention.
- FIG. 2 is a flowchart showing a method of manufacturing a superconducting thin film material in Embodiment 1 of the present invention.
- FIG. 3 is a diagram schematically showing how the superconducting layer is formed in the first embodiment of the present invention.
- FIG. 4 is a partial cross-sectional perspective view schematically showing a configuration of another superconducting thin film material in the first embodiment of the present invention.
- FIG. 5 is a partial cross-sectional perspective view schematically showing a configuration of a superconducting thin film material in Embodiment 2 of the present invention.
- FIG. 6 is a flowchart showing a method of manufacturing a superconducting thin film material in Embodiment 2 of the present invention.
- FIG. 7 is a partial cross-sectional perspective view schematically showing a configuration of a superconducting thin film material in Embodiment 3 of the present invention.
- FIG. 8 is a flowchart showing a method of manufacturing a superconducting thin film material in Embodiment 3 of the present invention.
- FIG. 9 is a graph showing the relationship between the thickness of the superconducting layer and the critical current value Ic in Example 1 of the present invention.
- FIG. 10 is a graph showing the relationship between the thickness of the superconducting layer and the surface roughness Ra in Example 1 of the present invention.
- FIG. 1 is a partial cross-sectional perspective view schematically showing the configuration of the superconducting thin film material according to Embodiment 1 of the present invention.
- superconducting thin film material 10 in the present embodiment has a tape-like shape, as metal substrate 1, intermediate layer 2, and vapor phase growth superconducting layer (first superconducting layer).
- the superconducting thin film material 10 is used in, for example, superconducting equipment.
- the metal substrate 1 is made of a metal such as stainless steel, nickel alloy (for example, Hastelloy), or silver alloy.
- the intermediate layer 2 is formed on the surface la of the metal substrate 1 and functions as a diffusion preventing layer.
- the intermediate layer 2 is made of an oxide having a crystal structure of, for example, a rock type, a perovskite type, or a pyrochlore type, and specifically includes cerium oxide, yttria-stabilized zirconium oxide (YSZ), magnesium oxide, It is made of materials such as yttrium oxide, ytterbium oxide, or barium zircoure.
- the superconducting layer 3 and the superconducting layer 4 are formed by being laminated on the intermediate layer 2.
- Superconducting layer 3 and superconducting layer 4 are made of substantially the same material, and have, for example, a RE123 composition.
- the force intermediate layer 2 described for the configuration in which the intermediate layer 2 is provided may be omitted.
- FIG. 2 is a flowchart showing a method for manufacturing the superconducting thin film material in the first embodiment of the present invention.
- metal substrate 1 is prepared (step S1), and the surface la of metal substrate 1 is made of, for example, YSZ.
- the intermediate layer 2 is formed by laser vapor deposition (Step S2).
- a superconducting layer 3 having, for example, a RE123-based composition is formed on the intermediate layer 2 by a vapor phase method (step S3).
- a vapor phase method for forming the superconducting layer 3 for example, a laser vapor deposition method, a sputtering method, an electron beam vapor deposition method or the like is used.
- the superconducting layer 4 having a RE 123-based composition is formed by a liquid phase method such as the MOD method so as to be in contact with the superconducting layer 3 (step S4).
- the superconducting thin film material 10 is completed through the above steps.
- step S2 the step of forming the intermediate layer 2
- step S3 the step of forming the superconducting layer 3 is the metal substrate 1 It is formed to touch the surface la.
- FIG. 3 is a diagram schematically showing the formation of the superconducting layer in the first embodiment of the present invention. It is.
- superconducting layer 3 is formed by a vapor phase method, so that film thickness dl of superconducting layer 3 is thick. In some cases, unevenness may exist on the surface S1.
- the superconducting layer 4 is formed by the liquid phase method, the solution containing the components of the superconducting layer 4 enters the irregularities, and the surface S1 of the superconducting layer 3 The crystal growth of the superconducting layer 4 takes place at the nucleus.
- the total thickness of superconducting layer 3 (dl) and superconducting layer 4 (d2) is the thickness of superconducting thin film material d3.
- the film thickness d3 of the superconducting thin film material can be increased without increasing the film thickness dl of the layer 3 and the film thickness d2 of the superconducting layer 4 so much. Thereby, the smoothness of the surface S1 of the superconducting layer 3 can be maintained, and a decrease in the crystal density of the superconducting layer 4 can be suppressed.
- the thickness of the superconducting thin film material can be increased with the smoothness of the surface S2 of the superconducting thin film material and the crystal denseness of the superconducting thin film material being good.
- the decrease can be suppressed, and the critical current density and critical current value can be improved.
- the superconducting layer 3 becomes the nucleus of crystal growth, and therefore the superconducting thin film material is likely to grow.
- an intermediate layer 2 made of an oxide having a crystal structure of rock type, perovskite type or neurochlore type is formed between the superconducting layer 3 and the metal substrate 1, and superconducting.
- Both layer 3 and superconducting layer 4 have a RE123-based composition, resulting in a superconducting thin film material with excellent surface smoothness and crystal compactness, and improved critical current density and critical current value. can do.
- the vapor phase method is any one of a laser vapor deposition method, a sputtering method, and an electron beam vapor deposition method, a superconducting thin film material having excellent surface smoothness and crystal denseness is obtained.
- the critical current density and the critical current value can be improved.
- liquid phase method is the MOD method
- a superconducting thin film material excellent in surface smoothness and crystal denseness can be obtained, and the critical current density and critical current value can be improved.
- the uppermost layer constituting the superconducting thin film material is the uppermost layer.
- another superconducting layer 9 may be formed in contact with the superconducting layer 4 as shown in FIG.
- the superconducting layer 9 may be formed by a vapor phase method or a liquid phase method. Thereby, another superconducting layer 9 can be formed on the superconducting layer 4 having excellent surface smoothness to achieve a thick film of the superconducting thin film material.
- FIG. 5 is a partial cross-sectional perspective view schematically showing the configuration of the superconducting thin film material in the second embodiment of the present invention.
- superconducting thin film material 10 in this embodiment includes metal substrate 1, intermediate layer 2, superconducting layer 3 as the first vapor growth superconducting layer, and superconducting as the first liquid phase growth superconducting layer.
- a superconducting layer 5 as a second vapor phase growth superconducting layer and a superconducting layer 6 as a second liquid phase growth superconducting layer are further provided.
- the superconducting layer 5 and the superconducting layer 6 are formed on the superconducting layer 4 by being laminated.
- Superconducting layer 5 and superconducting layer 6 are made of substantially the same material, and have, for example, a RE123-based composition.
- FIG. 6 is a flowchart showing a method of manufacturing a superconducting thin film material in Embodiment 2 of the present invention.
- step S4 in the method of manufacturing a superconducting thin film material of the present embodiment, after forming superconducting layer 4 (step S4), for example, it has a RE123-based composition so as to be in contact with superconducting layer 4
- Superconducting layer 5 is formed by a vapor phase method (step S5).
- a vapor phase method for forming the superconducting layer 5 for example, a laser vapor deposition method, a sputtering method, an electron beam vapor deposition method or the like is used.
- a superconducting layer 6 having, for example, a RE123-based composition is formed by a liquid phase method such as the MOD method so as to be in contact with the superconducting layer 5 (step S6).
- the superconducting thin film material 10 is completed through the above steps.
- the same effects as those of superconducting thin film material and the manufacturing method thereof in Embodiment 1 can be obtained.
- the superconducting thin film material is manufactured by alternately performing the formation of the superconducting layer by the vapor phase method and the superconducting layer by the liquid phase method, the thickness of each of the superconducting layers 3 to 6 is thin. In this state, the film thickness of the superconducting thin film material can be increased. As a result, the critical current value can be further increased.
- the superconducting layer 6 is formed on the superconducting layer 6 after forming the superconducting layer 6 (step S6) after the superconducting layer 6 is the uppermost layer of the superconducting thin film material.
- Another superconducting layer may be formed in contact!
- This superconducting layer may be formed by a vapor phase method or a liquid phase method.
- another superconducting layer can be formed on the superconducting layer 6 having excellent surface smoothness to achieve a thick film of the superconducting thin film material.
- FIG. 7 is a partial cross-sectional perspective view schematically showing the configuration of the superconducting thin film material according to Embodiment 3 of the present invention.
- superconducting thin film material 10 in the present embodiment further includes a superconducting layer 7 as a backside vapor phase growth superconducting layer, and a superconducting layer 8 as a backside liquid phase growth superconducting layer,
- the superconducting thin film material 10 in the present embodiment further includes a superconducting layer 7 as a backside vapor phase growth superconducting layer, and a superconducting layer 8 as a backside liquid phase growth superconducting layer,
- the superconducting thin film material 10 in the present embodiment further includes a superconducting layer 7 as a backside vapor phase growth superconducting layer, and a superconducting layer 8 as a backside liquid phase growth superconducting layer,
- the superconducting thin film material 10 in the present embodiment further includes a superconducting layer 7 as
- the superconducting layer 7 and the superconducting layer 8 are formed by being laminated on the back surface lb side of the metal substrate 1.
- the superconducting layer 7 and the superconducting layer 8 are made of substantially the same material, and have, for example, a RE 123-based composition.
- FIG. 8 is a flowchart showing a method of manufacturing a superconducting thin film material in Embodiment 3 of the present invention.
- step S6 after forming superconducting layer 6 (step S6), for example, RE123-based so as to be in contact with the rear surface lb of metal substrate 1.
- Superconducting layer 7 having the composition is formed by a vapor phase method (step S7).
- vapor phase methods for forming the superconducting layer 7 include laser vapor deposition and sputtering. For example, an etching method or an electron beam evaporation method is used.
- a superconducting layer 8 having a RE123-based composition is formed by a liquid phase method such as the MOD method so as to be in contact with the superconducting layer 7 (step S8).
- the superconducting thin film material 10 is completed through the above steps.
- the same effects as those of superconducting thin film material and the manufacturing method thereof in Embodiment 1 can be obtained. Since the superconducting thin film material can be formed on both the front surface la side and back surface lb side of the metal substrate 1, the current path of the superconducting wire can be increased, and the critical current density and critical current value can be increased. This can be further improved.
- a series of steps for forming superconducting layer 7 (step S7) and forming superconducting layer 8 (step S8) is arbitrary, and for example, metal substrate 1 is prepared (step S1). ) May be performed immediately after, or may be performed immediately after the formation of the superconducting layer 3 (step S2). An intermediate layer may be formed between the metal substrate 1 and the superconducting layer 7.
- Embodiments 1 to 3 the case of forming a superconducting layer made of a material having a RE 123-based composition has been described, but the present invention is not limited to such a case. For example, it can be applied to a manufacturing method for forming a superconducting layer of another material such as bismuth.
- the force intermediate layer 2 shown when the intermediate layer 2 is formed on the surface la of the metal substrate 1 may be omitted.
- the superconducting layer 3 is a metal substrate.
- each of the following Comparative Example A, Invention Example B, Invention Example C, Comparative Example D, and Comparative Example E was produced as a superconducting thin film material, and the critical current value and surface smoothness were measured. .
- Comparative Example A An intermediate layer made of a metal oxide was formed on a Ni alloy substrate by vapor phase deposition. The surface roughness Ra of the surface of the intermediate layer was 5 nm. Subsequently, a superconducting layer made of HoBa Cu 2 O (HoBCO) was formed on the intermediate layer with a thickness of 0.2 m by using the PLD method.
- HoBCO HoBa Cu 2 O
- Invention Example B First, a structure similar to that of Comparative Example A was produced. Subsequently, a superconducting layer made of HoBa Cu 2 O (HoBCO) was formed to a thickness of 0.3 ⁇ m on the superconducting layer using the MOD method.
- HoBCO HoBa Cu 2 O
- the total film thickness of the superconducting layer became 0.5 m.
- Invention Example C First, a structure similar to that of Invention Example B was produced. Subsequently, a superconducting layer made of HoBa Cu 2 O (HoBCO) is formed to a thickness of 0.3 m on the superconducting layer using the PLD method.
- HoBCO HoBa Cu 2 O
- the total film thickness of the superconducting layer became 0.8 m.
- Comparative Example D First, a structure similar to that of Comparative Example A was produced. Subsequently, a superconducting layer made of HoBa Cu O (HoBCO) was formed to a thickness of 0.3 ⁇ m on the superconducting layer using the PLD method.
- HoBCO HoBa Cu O
- Comparative Example E First, a structure similar to Comparative Example D was produced. Subsequently, a superconducting layer made of HoBa Cu O (HoBCO) was formed to a thickness of 0.3 ⁇ m on the superconducting layer using the PLD method.
- HoBCO HoBa Cu O
- the critical current value per lcm width and the surface roughness Ra measured in each of Comparative Example A, Invention Example B, Invention Example C, Comparison Example D, and Comparison Example E are shown in Table 1, FIG. And in Figure 10.
- the surface roughness Ra means the arithmetic average roughness Ra specified in JIS (Japanese Industrial Standards).
- each of Comparative Example A, Invention Example B, and Invention Example C is compared, and the critical current value increases as the thickness of the superconducting layer increases. tl.
- the critical current value increases tl as the thickness of the superconducting layer increases.
- the present invention example B and the comparative example D are compared, and although the present invention example B and the comparative example D have the same film thickness, the present invention example B has a smaller surface roughness Ra. And the critical current value is large.
- Inventive Example C has a smaller surface roughness Ra.
- the critical current value is large. From this, it is possible to improve the surface smoothness of the superconducting layer by forming the superconducting layer by the liquid phase method after forming the superconducting layer by the vapor phase method as in the present invention example, and the critical current density and the critical current. It can be seen that the value can be improved.
- the present invention is suitable for superconducting equipment including, for example, a superconducting fault current limiter, a magnetic field generator, a superconducting cable, a superconducting bus bar, and a superconducting coil.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/278,369 US8216979B2 (en) | 2006-02-16 | 2007-01-17 | Method of manufacturing superconducting thin film material, superconducting device and superconducting thin film material |
CA002641902A CA2641902A1 (en) | 2006-02-16 | 2007-01-17 | Method of manufacturing superconducting thin film material, superconducting device and superconducting thin film material |
EP07713628.1A EP1990809B1 (en) | 2006-02-16 | 2007-01-17 | Process for producing superconducting thin-film material |
KR1020087022272A KR101289999B1 (ko) | 2006-02-16 | 2007-01-17 | 초전도 박막 재료의 제조 방법 및 초전도 기기 |
AU2007216115A AU2007216115A1 (en) | 2006-02-16 | 2007-01-17 | Method of manufacturing superconducting thin-film material, superconducting device and superconducting thin-film material |
NO20083913A NO20083913L (no) | 2006-02-16 | 2008-09-12 | Fremgangsmate for fremstilling av superledende tynnfilmmateriale, superledende innretning og superledende tynnfilmmateriale |
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JP2006039395A JP2007220467A (ja) | 2006-02-16 | 2006-02-16 | 超電導薄膜材料の製造方法、超電導機器、および超電導薄膜材料 |
JP2006-039395 | 2006-02-16 |
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WO2007094146A1 true WO2007094146A1 (ja) | 2007-08-23 |
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PCT/JP2007/050592 WO2007094146A1 (ja) | 2006-02-16 | 2007-01-17 | 超電導薄膜材料の製造方法、超電導機器、および超電導薄膜材料 |
Country Status (11)
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US (1) | US8216979B2 (ja) |
EP (1) | EP1990809B1 (ja) |
JP (1) | JP2007220467A (ja) |
KR (1) | KR101289999B1 (ja) |
CN (1) | CN101385096A (ja) |
AU (1) | AU2007216115A1 (ja) |
CA (1) | CA2641902A1 (ja) |
NO (1) | NO20083913L (ja) |
RU (1) | RU2399106C2 (ja) |
TW (1) | TW200741749A (ja) |
WO (1) | WO2007094146A1 (ja) |
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US8153281B2 (en) * | 2003-06-23 | 2012-04-10 | Superpower, Inc. | Metalorganic chemical vapor deposition (MOCVD) process and apparatus to produce multi-layer high-temperature superconducting (HTS) coated tape |
JP4690246B2 (ja) * | 2006-05-19 | 2011-06-01 | 住友電気工業株式会社 | 超電導薄膜材料およびその製造方法 |
JP2010040962A (ja) * | 2008-08-08 | 2010-02-18 | Sumitomo Electric Ind Ltd | 超電導コイル |
CN102884594B (zh) * | 2010-02-05 | 2016-06-08 | 株式会社瑞蓝 | 形成陶瓷线的方法、形成陶瓷线的系统、以及采用其的超导体线 |
DE102010038656A1 (de) * | 2010-07-29 | 2012-02-02 | THEVA DüNNSCHICHTTECHNIK GMBH | Hochtemperatur-Supraleiter-Bandleiter mit hoher kritischer Stromtragfähigkeit |
JP5838596B2 (ja) * | 2011-05-30 | 2016-01-06 | 住友電気工業株式会社 | 超電導薄膜材料およびその製造方法 |
DE102012223366A1 (de) | 2012-12-17 | 2014-06-18 | Siemens Aktiengesellschaft | Supraleitende Spuleneinrichtung mit Spulenwicklung und Kontakten |
CN103367626B (zh) * | 2013-07-02 | 2015-08-12 | 西北有色金属研究院 | 一种涂层导体超导膜及其制备方法 |
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JPH01100815A (ja) * | 1987-10-14 | 1989-04-19 | Fujikura Ltd | 高温超電導材 |
JP2002075079A (ja) * | 2000-08-29 | 2002-03-15 | Sumitomo Electric Ind Ltd | 高温超電導厚膜部材およびその製造方法 |
JP2003323822A (ja) | 2002-05-02 | 2003-11-14 | Sumitomo Electric Ind Ltd | 薄膜超電導線材およびその製造方法 |
JP2005093205A (ja) * | 2003-09-17 | 2005-04-07 | Sumitomo Electric Ind Ltd | 超電導体およびその製造方法 |
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RU2032765C1 (ru) | 1987-04-03 | 1995-04-10 | Фудзицу Лимитед | Способ нанесения алмазного покрытия из паровой фазы и устройство для его осуществления |
RU2043981C1 (ru) | 1992-10-19 | 1995-09-20 | Физико-технический институт им.А.Ф.Иоффе РАН | Керамический материал |
AU727072B2 (en) | 1997-03-25 | 2000-11-30 | American Superconductor Corporation | Coating of a superconductor |
RU2133525C1 (ru) | 1997-10-21 | 1999-07-20 | Омский государственный университет | Сверхпроводящий квантовый интерференционный датчик и способ его изготовления |
EP1178494A4 (en) * | 1999-04-15 | 2007-02-28 | Fujikura Ltd | OXIDE SUPERCONDUCTOR, CORRESPONDING MANUFACTURING METHOD, AND BASIC MATERIAL FOR OXIDE SUPERCONDUCTOR |
JP2002063815A (ja) * | 2000-08-15 | 2002-02-28 | Fujikura Ltd | 酸化物超電導導体とその製造方法 |
JP3407733B2 (ja) | 2000-12-13 | 2003-05-19 | 住友電気工業株式会社 | 無機固体電解質薄膜の形成方法 |
JP2003324167A (ja) * | 2002-02-26 | 2003-11-14 | Kyocera Corp | セラミック回路基板 |
JP4012772B2 (ja) | 2002-07-03 | 2007-11-21 | 株式会社フジクラ | 酸化物超電導体テープ線材 |
JP4690246B2 (ja) * | 2006-05-19 | 2011-06-01 | 住友電気工業株式会社 | 超電導薄膜材料およびその製造方法 |
-
2006
- 2006-02-16 JP JP2006039395A patent/JP2007220467A/ja not_active Withdrawn
-
2007
- 2007-01-17 EP EP07713628.1A patent/EP1990809B1/en not_active Not-in-force
- 2007-01-17 RU RU2008137076/09A patent/RU2399106C2/ru not_active IP Right Cessation
- 2007-01-17 WO PCT/JP2007/050592 patent/WO2007094146A1/ja active Application Filing
- 2007-01-17 CA CA002641902A patent/CA2641902A1/en not_active Abandoned
- 2007-01-17 AU AU2007216115A patent/AU2007216115A1/en not_active Abandoned
- 2007-01-17 US US12/278,369 patent/US8216979B2/en active Active
- 2007-01-17 CN CNA2007800058710A patent/CN101385096A/zh active Pending
- 2007-01-17 KR KR1020087022272A patent/KR101289999B1/ko active IP Right Grant
- 2007-02-05 TW TW096104050A patent/TW200741749A/zh unknown
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2008
- 2008-09-12 NO NO20083913A patent/NO20083913L/no not_active Application Discontinuation
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JPH01100815A (ja) * | 1987-10-14 | 1989-04-19 | Fujikura Ltd | 高温超電導材 |
JP2002075079A (ja) * | 2000-08-29 | 2002-03-15 | Sumitomo Electric Ind Ltd | 高温超電導厚膜部材およびその製造方法 |
JP2003323822A (ja) | 2002-05-02 | 2003-11-14 | Sumitomo Electric Ind Ltd | 薄膜超電導線材およびその製造方法 |
JP2005093205A (ja) * | 2003-09-17 | 2005-04-07 | Sumitomo Electric Ind Ltd | 超電導体およびその製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
JP2007220467A (ja) | 2007-08-30 |
EP1990809A1 (en) | 2008-11-12 |
EP1990809A4 (en) | 2012-08-01 |
US20090239753A1 (en) | 2009-09-24 |
US8216979B2 (en) | 2012-07-10 |
RU2399106C2 (ru) | 2010-09-10 |
EP1990809B1 (en) | 2013-07-17 |
CN101385096A (zh) | 2009-03-11 |
AU2007216115A1 (en) | 2007-08-23 |
KR20080103558A (ko) | 2008-11-27 |
RU2008137076A (ru) | 2010-03-27 |
KR101289999B1 (ko) | 2013-07-30 |
NO20083913L (no) | 2008-09-12 |
TW200741749A (en) | 2007-11-01 |
CA2641902A1 (en) | 2007-08-23 |
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