# US 2017/0287598 A1 · Oxide superconductor, superconducting wire, and a method of manufacturing the same

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- Number: US 2017/0287598 A1
- Document ID: US20170287598A1
- Status: Published application
- Kind: A1
- Application number: 15/507,583
- Filed: 2015-11-05
- Published: 2017-10-05
- Earliest claimed: 2014-11-05
- Assignees: Fujikura Ltd.
- Applicants: Fujikura Ltd.
- Inventors: Yutaka Adachi
- Web page: https://patentgrep.com/patent/US20170287598A1

## CPC

- C01F 17/235: Cerium oxides or hydroxides
- C01G 1/00: Methods of preparing compounds of metals not covered by subclasses C01B, C01C, C01D, or C01F, in general (electrolytic production of inorganic compounds C25B1/00)
- C01G 3/00: Compounds of copper
- C01G 3/006: {Compounds containing copper, with or without oxygen or hydrogen, and containing two or more other elements}
- C04B 35/4508: {Type 1-2-3}
- C04B 35/62218: {obtaining ceramic films, e.g. by using temporary supports}
- C23C 14/3485: {using pulsed power to the target}
- H01B 12/04: Single wire
- H01B 12/06: Films or wires on bases or cores
- H01B 13/00: Apparatus or processes specially adapted for manufacturing conductors or cables
- H01F 6/06: Coils, e.g. winding, insulating, terminating or casing arrangements therefor
- C04B 2235/3215: Barium oxides or oxide-forming salts thereof
- C04B 2235/3224: Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B 2235/3225: Yttrium oxide or oxide-forming salts thereof
- C04B 2235/781: Nanograined materials, i.e. having grain sizes below 100 nm
- C04B 2235/785: Submicron sized grains, i.e. from 0,1 to 1 micron
- C04B 2235/787: Oriented grains
- C04B 2235/80: Phases present in the sintered or melt-cast ceramic products other than the main phase
- C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00})
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

An oxide superconductor has a composition expressed by REaBabCu3O7-x, where RE represents one rare earth or a combination of two or more of a rare earth, a satisfies 1.05≦a≦1.35, b satisfies 1.80≦b≦2.05, and x represents an amount of oxygen deficiency, and a non-superconducting phase having an outer diameter of 30 nm or less is included in a superconducting phase.

## Claims

### Claim 1

An oxide superconductor having a composition expressed by REaBabCu3O7-x, where RE represents one rare earth or a combination of two or more of a rare earth, a satisfies 1.05≦a≦1.35, b satisfies 1.80≦b≦2.05, and x represents an amount of oxygen deficiency, wherein a non-superconducting phase having an outer diameter of 30 nm or less is included in a superconducting phase.

### Claim 2 (depends on 1)

The oxide superconductor according to claim 1, wherein the RE is one or a combination of two or more of Y, Gd, Eu and Sm.

### Claim 3 (depends on 1)

An oxide superconducting wire comprising a base material, an intermediate layer, an oxide superconducting layer comprising the oxide superconductor according to claim 1, and a stabilization layer, which are sequentially laminated.

### Claim 4 (depends on 3)

The oxide superconducting wire according to claim 3, wherein the non-superconducting phase is dispersed on a plane orthogonal to a laminate direction.

### Claim 5 (depends on 3)

A method of manufacturing the oxide superconducting wire according to claim 3, the method comprising forming the oxide superconductor on a film formation surface of the base material by a pulse laser deposition method.

### Claim 6 (depends on 5)

The method of manufacturing the oxide superconducting wire according to claim 5, the method comprising direct heating the film formation surface during forming the oxide superconductor.