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    5.
    发明专利
    未知

    公开(公告)号：DE60316872T2

    公开(公告)日：2008-01-31

    申请号：DE60316872

    申请日：2003-06-11

    Applicant: INT SUPERCONDUCTIVITY TECH ,  RAILWAY TECHNICAL RES INST THE

    Inventor： TOMITA MASARU ,  MURAKAMI MASATO

    IPC: H01F6/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24

    Abstract: There is established means for providing a superconducting magnet made of a high-temperature bulk superconductor, capable of trapping a high magnetic field with ease and stably. The superconducting magnet made of the high-temperature bulk superconductor, for use by trapping a magnetic field, comprises the bulk superconductor provided with an artificial hole, a low melting metal impregnated into, and filling up at least the artificial hole, and a heat conducting metal material embedded with portions of the high-temperature bulk superconductor, impregnated with, and filled with the low melting metal. The superconducting magnet can be produced by a process comprising steps of providing the artificial hole in the high-temperature bulk superconductor, disposing the heat conducting metal material in at least the artificial hole, applying a process of impregnating and filling up at least the artificial hole with the low melting metal, and subsequently, executing a process of magnetizing.

    6.
    发明专利
    未知

    公开(公告)号：DE60024737T2

    公开(公告)日：2006-08-31

    申请号：DE60024737

    申请日：2000-08-24

    Applicant: INT SUPERCONDUCTIVITY TECH ,  RAILWAY TECHNICAL RES INST KOK

    Inventor： TOMITA MASARU ,  MURAKAMI MASATO

    IPC: C01G3/00 ,  H01L39/12 ,  C01G1/00 ,  H01L39/24

    Abstract: The invention provides an oxide superconductor capable of sufficiently withstanding external force such as a large electromagnetic force and thermal stress accompanying rapid heating and cooling while in service, and internal stress so as to be able to exhibit a high trapped magnetic field stably over a long period of time. The oxide superconductor bulk body such as, for example, a copper oxide superconductor containing rare earth elements is impregnated with a low melting metal, and optionally has a thin film of the low melting metal formed on the external surface thereof. Such oxide superconductors can be produced by a process whereby the oxide superconductive bulk body kept in an atmosphere of reduced pressure is brought into contact with the low melting metal. Further, if the oxide superconductive bulk body is provided with pores beforehand, further improvement in production efficiency and product performance can be expected.

    8.
    发明专利
    未知

    公开(公告)号：DE60024737D1

    公开(公告)日：2006-01-19

    申请号：DE60024737

    申请日：2000-08-24

    Applicant: INT SUPERCONDUCTIVITY TECH ,  RAILWAY TECHNICAL RES INST KOK

    Inventor： TOMITA MASARU ,  MURAKAMI MASATO

    IPC: C01G3/00 ,  C01G1/00 ,  H01L39/12 ,  H01L39/24

    Abstract: The invention provides an oxide superconductor capable of sufficiently withstanding external force such as a large electromagnetic force and thermal stress accompanying rapid heating and cooling while in service, and internal stress so as to be able to exhibit a high trapped magnetic field stably over a long period of time. The oxide superconductor bulk body such as, for example, a copper oxide superconductor containing rare earth elements is impregnated with a low melting metal, and optionally has a thin film of the low melting metal formed on the external surface thereof. Such oxide superconductors can be produced by a process whereby the oxide superconductive bulk body kept in an atmosphere of reduced pressure is brought into contact with the low melting metal. Further, if the oxide superconductive bulk body is provided with pores beforehand, further improvement in production efficiency and product performance can be expected.

    9.
    发明专利
    未知

    公开(公告)号：DE69812781T2

    公开(公告)日：2003-10-23

    申请号：DE69812781

    申请日：1998-07-02

    Applicant: SUMITOMO ELECTRIC INDUSTRIES ,  INT SUPERCONDUCTIVITY TECH

    Inventor： HAYASHI NORIKI ,  MURAKAMI MASATO

    IPC: C04B35/653 ,  C01G1/00 ,  C01G3/00 ,  C30B9/00 ,  C30B11/00 ,  C30B29/22 ,  H01B12/00 ,  H01B13/00 ,  H01L39/24

    Abstract: Provided is a method of preparing a large-sized oxide superconducting bulk body having excellent characteristics and high homogeneity. The method is adapted to prepare an oxide superconducting bulk body by melt growth through a seed crystal method, and comprises steps of preparing a precursor by press-molding material powder obtained by mixing REBa2Cu3O7-Z powder with RE2BaCuO5 or RE4Ba2Cu2O10 powder and a platinum additive, homogeneously semi-melting the precursor by holding the same at a holding temperature T1 DEG C (t1 + 20 ≤ T1 ≤ t1 + 80 assuming that the melting point of the oxide superconducting bulk body is t1 DEG C) for a prescribed time, and crystal-growing the precursor at a temperature not more than the melting point t1 DEG C.

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