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EP0286106A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for manufacturing a superconductive device

Assignee: Hitachi Ltd
•
Filing: 1988-04-07
•
Granted: —
•
Expires: 2008-04-07
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Abstract

Abstract A process for controlling an oxygen content of a non-superconductive or superconductive oxide is provided, in which a beam of particles such as ions, electrons or neutrons or an electromagnetic radiation is applied to the non-superconductive or superconductive oxide of a perovskite type such as YBa₂Cu₃O 7-x , thereby increasing or reducing the oxygen content of the oxide at the sites of oxygen in the crystal lattice of the oxide. Furthermore, a superconductive device such as a superconductive magnet, superconductive power transmission wire, superconductive transformer, superconductive shield, permanent current switch and electronic element is made by utilizing the process for controlling the oxygen concentration of the superconduc­tive oxide.

Inventors

  • 👤 Takahiko Kato
  • 👤 Katsuzo Aihara
  • 👤 Jiro Kuniya
  • 👤 Yutaka Misawa
  • 👤 Yoshihide Wadayama
  • 👤 Masahiro Ogihara
  • 👤 Toshikazu Nishino
  • 👤 Ushio Kawabe
  • 👤 Haruhiro Hitachi Daini Kyoshinryo Hasegawa
  • 👤 Kazumasa Takagi
  • 👤 Tokuumi Fukazawa
  • 👤 Katsuki Miyauchi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 04:19
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0661; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/048; H01F6/00; H01F6/06; H10N60/0884; H10N60/0912; H10N60/0941; H10N60/20; H10N60/203; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/73

Claims Analysis

Total Claims: 25
Claim 1
Independent Claim 49 words
A process for controlling an oxygen content of a non-superconductive or superconductive oxide, which comprises applying particle beams or electromagnetic radiation to said non-superconductive or superconduc­tive oxide, thereby increasing or reducing the oxygen content of said oxide at the sites of oxygen in the crystal lattice of said oxide.
Claim 2
Dependent Claim 49 words
A process for controlling an oxygen content of a non-superconductive or superconductive oxide, which comprises applying particle beams or electromagnetic radiation to said non-superconductive or superconduc­tive oxide, thereby increasing or reducing the oxygen content of said oxide at the sites of oxygen in the crystal lattice of said oxide.
Claim 3
Dependent Claim 35 words
A process for controlling an oxygen content of a non-superconductive or superconductive oxide, which comprises applying particle beams or electro­magnetic radiations to said non-superconductive or superconductive oxide, while or followed by heat treating said oxide.
Claim 4
Dependent Claim 35 words
A process for controlling an oxygen content of a non-superconductive or superconductive oxide, which comprises applying particle beams or electro­magnetic radiations to said non-superconductive or superconductive oxide, while or followed by heat treating said oxide.
Claim 5
Dependent Claim 41 words
The process according to Claim 2 , wherein the heat treatment is carried out at a temperature between the complete solid solution temperature of said oxide T°K and T/3°K (both ends inclusive) for a period of 1 second to 30 hours.
Claim 6
Dependent Claim 35 words
The process of any of Claims 1 to 3, wherein said non-superconductive oxide has a composition capable of being converted to said superconductive oxide by applying particle beams or electromagnetic radiations to said non-superconductive oxide.
Claim 7
Dependent Claim 38 words
The process of any of Claims 1 to 4, wherein said superconductive oxide is at least one selected from the group consisting of perovskite oxides, layer perovskite oxides, oxygen-deficient layer perovskite oxides, multi­layer perovskite oxides and spinel oxides.
Claim 8
Dependent Claim 86 words
The process according to Claim 5 , wherein said perovskite oxide has a structure of ABO₃, wherein A is Ba, Pb, La, Pr or Nd, B is Cu, Mg, Mn, Fe, Co or Ni, or A 1-x Aʹ x BO₃, wherein A and B are the same as defined above, and Aʹ is Ca, Ba, Sr or Pb, such as BaPb 1-x Bi x O₃, BaPbO₃, LaCuO₃, LaCoO₃, (La 1-x Sr x )CoO₃, (La 1-x Sr x )CrO₃, (La 1-x Sr x )CrO 3-δ or SrFeO₃.
Claim 9
Dependent Claim 92 words
The process according to Claim 5 , wherein said layer perovskite oxide has a structure of A₂BO₄, wherein A is a rare earth metal and B is a transition metal, such as La₂CuO₄ or La₂NiO₄, or A₂ (1-x) Aʹ 2x BO₄, wherein A and Aʹ are elements of Group IIIB and Group IIA of the Periodic Table, respectively, and B is a transition metal, such as (La 1-x Sr x )₂CuO₄, (La 1-x Ba x )₂CuO₄, (Y 1-x Ba x )₂CuO₄, (Y 1-x Sr x )₂CuO₄ or (Sc 1-x Sr x )₂CuO₄.
Claim 10
Dependent Claim 92 words
The process according to Claim 5 , wherein said oxygen-deficient perovskite layer oxide has a structure of AB₂C₃O 7-x , wherein A is Y, La, Nd, Dy, Sm, Eu, Gd, Ho, Er, Tm or Yb, B is Ba, Sr, Ca or Sc and C is mainly Cu, such as YBa₂Cu₃O 7-x , LnBa₂Cu₃O 7-x wherein Ln is a lanthanoid as indicated above, YSr₂Cu₃O 7-x , YBa₂Cu 3-x ­Ni x O 7-y , YBa₂Cu 3-x Ag x O 7-y , YBaCaCu₃O 7-x , Y 0.75 Sc 0.25 ­Ba₂Cu₃O 7-x or YBa₂Cu₃F₂O y .
Claim 11
Dependent Claim 49 words
The process according to Claim 5, wherein said multilayer perovskite oxide has a structure of A₂(B,C)₃D 2+x O₈ or of similar compositions, wherein A is Bi or Tl, B is Ba or Sr, C is Ca and D is Cu, such as Bi₄Sr₃Ca₃Cu 4+x O₁₆ or Tl₄Ba₂Ca₂Cu 4+x O₁₆.
Claim 12
Dependent Claim 27 words
The process according to Claim 5 , wherein said spinel oxide has a structure of AB₂O₄, wherein A is Li and B is Ti, such as LiTi₂O₄.
Claim 13
Dependent Claim 71 words
The process of any of Claims 1 to 10, wherein said particle beam is one of ions, electrons or neutrons having an energy exceeding that necessary for displace­ment of oxygen at the site of crystal lattice of said oxide to reduce the oxygen content of said oxide at the sites of oxygen in the crystal lattice of said oxide, except that the application of hydrogen ions do not require such energy.
Claim 14
Dependent Claim 30 words
The process according to Claim 11, wherein said ions are of one or more of hydrogen, oxygen, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, zinc, silicon, nitrogen, aluminum and magnesium
Claim 15
Dependent Claim 19 words
The process of any of Claims 1 to 10, wherein said electromagnetic radiation is laser light or infrared ray.
Claim 16
Dependent Claim 24 words
The process of any of Claims 1 to 10 and 13, wherein the application of electromagnetic radiation is carried out in an oxygen atmosphere.
Claim 17
Dependent Claim 41 words
A superconductive device which has a non-­superconductive oxide layer formed on an electrically insulative substrate, said layer containing a superconductive oxide region formed therein by applying particle beams or electromagnetic radiations to the non-superconductive oxide layer at a predetermined region thereof.
Claim 18
Dependent Claim 41 words
A superconductive device which has a non-­superconductive oxide layer formed on an electrically insulative substrate, said layer containing a superconductive oxide region formed therein by applying particle beams or electromagnetic radiations to the non-superconductive oxide layer at a predetermined region thereof.
Claim 19
Dependent Claim 39 words
A superconductive device which has a supercon­ductive oxide layer formed on an electrically insulative substrate, said layer containing a non-superconductive oxide region formed therein by applying particle beams or electromagnetic radiations to the superconductive layer at a predetermined region.
Claim 20
Dependent Claim 39 words
A superconductive device which has a supercon­ductive oxide layer formed on an electrically insulative substrate, said layer containing a non-superconductive oxide region formed therein by applying particle beams or electromagnetic radiations to the superconductive layer at a predetermined region.
Claim 21
Dependent Claim 40 words
The superconductive device according to Claim 15 or 16, wherein said superconductive oxide is made of at least one selected from the group consisting of perovskite oxides, layer perovskite oxides, oxygen-­deficient layer perovskite oxides, multilayer perovskite oxides and spinel oxides.
Claim 22
Dependent Claim 32 words
The superconductive device of any of Claims 15 to 17, said device being any of a superconductive magnet, superconductive power transmission wire, superconductive transformer, superconductive shield, permanent current switch and electronic element.
Claim 23
Dependent Claim 15 words
The superconductive device according to Claim 18, wherein said element includes superconductive circuits or wirings.
Claim 24
Dependent Claim 65 words
A process for manufacturing a superconduc­tive device, which comprises applying particle beams or electromagnetic radiations to a layer or body of super­conductive or non-superconductive oxide at a predeter­mined region(s) thereof, optionally while or followed by heat treating said layer or body of superconductive or non-superconductive oxide, thereby converting said superconductive oxide to a non-superconductive, or said non-superconductive oxide to a superconductive oxide at said region.
Claim 25
Dependent Claim 65 words
A process for manufacturing a superconduc­tive device, which comprises applying particle beams or electromagnetic radiations to a layer or body of super­conductive or non-superconductive oxide at a predeter­mined region(s) thereof, optionally while or followed by heat treating said layer or body of superconductive or non-superconductive oxide, thereby converting said superconductive oxide to a non-superconductive, or said non-superconductive oxide to a superconductive oxide at said region.

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