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    OXIDE SUPERCONDUCTOR WIRE MATERIAL, AND MANUFACTURING METHOD OF THE SAME
    2.
    发明专利
    OXIDE SUPERCONDUCTOR WIRE MATERIAL, AND MANUFACTURING METHOD OF THE SAME 失效

    公开(公告)号：JP2002150855A

    公开(公告)日：2002-05-24

    申请号：JP2000348192

    申请日：2000-11-15

    Applicant: FURUKAWA ELECTRIC CO LTD ,  INT SUPERCONDUCTIVITY TECH

    Inventor： MATSUMOTO KANAME ,  HIRABAYASHI IZUMI ,  IKEDA TAKERU

    IPC: C23C14/08 ,  H01B12/06 ,  H01B13/00

    Abstract: PROBLEM TO BE SOLVED: To provide an oxide superconductor wire material having stable and excellent crystalline property at its whole lengthened part, with an oxide superconductor film showing high critical current density, and to provide a manufacturing method of the same. SOLUTION: For the oxide superconductor wire material comprising a polycrystalline metal base (1) having an aggregation structure oriented to 100} direction, oxide buffer layers (2, 3) formed on the polycrystalline metal base (1), and an oxide superconductor layer (4) formed on the oxide buffer layer (2, 3), the oxide buffer layer (2, 3) is composed of the first oxide buffer layer (2) with a surface coarseness of Rmax=0.15 μm or less which is a surface oxide layer of the polycrystalline metal base (1), and the second oxide buffer layer (3) formed on the first oxide buffer layer (2).

    SUPERCONDUCTIVE WIRE USING POLYCRYSTAL SUBSTRATE AS BASE MATERIAL AND HAVING HIGH CRITICAL CURRENT DENSITY
    4.
    发明专利
    SUPERCONDUCTIVE WIRE USING POLYCRYSTAL SUBSTRATE AS BASE MATERIAL AND HAVING HIGH CRITICAL CURRENT DENSITY 失效

    公开(公告)号：JPH11134950A

    公开(公告)日：1999-05-21

    申请号：JP30982597

    申请日：1997-10-24

    Applicant: INT SUPERCONDUCTIVITY TECH ,  NGK INSULATORS LTD ,  SHOWA ELECTRIC WIRE & CABLE CO ,  FURUKAWA ELECTRIC CO LTD

    Inventor： ARAI YUSUKE ,  YAMADA YOUSHI ,  TAKAHASHI YASUO ,  MATSUMOTO KANAME ,  HIRABAYASHI IZUMI

    IPC: C01G1/00 ,  C01G3/00 ,  H01B12/06 ,  H01L39/24

    Abstract: PROBLEM TO BE SOLVED: To realize a high critical current density in a magnetic field while reducing the weak connection of a superconductive characteristic by providing a self-flattened oxide superconductive film on a polycrystal substrate having rugged parts due to a grain boundary. SOLUTION: Polycrystal having aligned face orientation can be formed into a long-size and it is manufactured by rolling at a low cost, and since a self-flattened oxide superconductive film is hard to be formed with a grain boundary in the rugged part of the grain boundary of the substrate, an excellent superconductive characteristic is obtained. The self-flattened superconductive film is desirably formed by a solution growing method for growing a film having excellent crystallization at a high speed, and it has Y123 type crystal structure. As a polycrystal substrate, a metal of silver or the like, which does not react with the oxide superconductive material and of which orientation is controlled and of which crystal orientation is aligned such as 100} and 110} , is desirably used. Or an oxide can be used, or a metal plate formed with an oxide film such as magnesium oxide, which does not react with the metal plate and the oxide superconductive material, thereon can be used.

    SUPERCONDUCTING WIRE HAVING HIGH CRITICAL CURRENT DENSITY
    8.
    发明专利
    SUPERCONDUCTING WIRE HAVING HIGH CRITICAL CURRENT DENSITY 失效

    公开(公告)号：JPH11111080A

    公开(公告)日：1999-04-23

    申请号：JP28315597

    申请日：1997-10-01

    Applicant: INT SUPERCONDUCTIVITY TECH ,  NGK INSULATORS LTD ,  CHUBU ELECTRIC POWER ,  HITACHI LTD

    Inventor： ARAI YUSUKE ,  YAMADA YASUSHI ,  KAWASHIMA JUNICHI ,  BUN TAKEKUNI ,  HIRABAYASHI IZUMI ,  KOSHIZUKA NAOKI ,  HIGASHIYAMA KAZUHISA ,  FUJIWARA TETSUO

    IPC: C01G1/00 ,  C01G3/00 ,  H01B12/06 ,  H01L39/02

    Abstract: PROBLEM TO BE SOLVED: To improve critical current density in a magnetic field by the introduction of low inclination grain boundaries into a superconducting oxide film by forming a biaxially oriented superconducting oxide film on a metallic silver substrate having a 100} texture. SOLUTION: An oxide intermediate layer biaxially oriented in a substrate plane, a parallel plane of a substrate is proper in 100}, and magnesium oxide MgO is used as a material. When a lattice miss fit of oxide and superconducting oxide of this intermediate layer is high like 6 to 11%. The superconducting oxide growing on the oxide of the intermediate layer performs pseudo epitaxial growth having fluctuation in in-plane orientation. Due to this fluctuation, low inclination grain boundaries less than one degree of an inclination of a degree of not interrupting a path of a superconducting current, are generated in large numbers in a C axis oriented superconducting oxide film manufactured on the oxide of the intermediate layer. Since these low inclination grain boundaries operate as pin fastening points to trap a magnetic field, high critical current density in the magnetic field can be realized.

    SOLUTION FOR PRODUCING OXIDE CRYSTAL
    9.
    发明专利
    SOLUTION FOR PRODUCING OXIDE CRYSTAL 失效

    公开(公告)号：JP2002338393A

    公开(公告)日：2002-11-27

    申请号：JP2001144534

    申请日：2001-05-15

    Applicant: CHUBU ELECTRIC POWER ,  INT SUPERCONDUCTIVITY TECH

    Inventor： SUGA TOSHIHIRO ,  YAMADA YASUSHI ,  HIRABAYASHI IZUMI

    IPC: C30B29/22 ,  C30B17/00 ,  C30B19/04 ,  H01L21/208

    Abstract: PROBLEM TO BE SOLVED: To provide a solution for producing an oxide crystal, with which it is possible to improve the crystallinity of the oxide crystal when the oxide crystal having a Y123-type crystal structure is grown from a solution phase. SOLUTION: The solution is used for producing the oxide crystal by growing the oxide crystal having the Y123-type crystal structure from the solution phase by a liquid phase method. The solvent (melt) composition forming the solution phase is made to be a BaO-CuO-BaF2 system, and the atomic ratio of Ba to Cu is adjusted to be in the range of 42:58 to 20:80. Thereby, it becomes possible to lower the temperature at growing the crystal.

    MANUFACTURE OF OXIDE-BASED SUPERCONDUCTIVE STRUCTURE
    10.
    发明专利
    MANUFACTURE OF OXIDE-BASED SUPERCONDUCTIVE STRUCTURE 失效

    公开(公告)号：JP2000322951A

    公开(公告)日：2000-11-24

    申请号：JP13494599

    申请日：1999-05-14

    Applicant: CHUBU ELECTRIC POWER ,  INT SUPERCONDUCTIVITY TECH

    Inventor： YOSHIDA TAKASHI ,  HASEGAWA MASATO ,  HIRABAYASHI IZUMI

    IPC: H01B12/06 ,  H01B13/00

    Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method of an oxide-based superconductive structure capable of manufacturing a superconductive layer having a high critical temperature and high critical current density particularly in a magnetic field at a practically possible deposition rate and in a condition that there is no risk of the occurrence of a crack. SOLUTION: This method is used to manufacture an oxide-based superconductive structure by forming a superconductive layer 8 formed of an oxide-based superconductor on a base material 2. The method comprises a pseudo liquid layer forming process for forming a pseudo liquid layer 6 by the use of material having a melting point lower than that of the oxide-based superconductor, and a superconductive layer forming process for depositing the superconductive layer 8 by the use of the oxide-based superconductor after the pseudo liquid layer deposition process.

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