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    HIGH-TEMPERATURE SUPER CONDUCTING ELEMENT
    1.
    发明专利
    HIGH-TEMPERATURE SUPER CONDUCTING ELEMENT 失效

    公开(公告)号：JP2001223399A

    公开(公告)日：2001-08-17

    申请号：JP2000368368

    申请日：2000-12-04

    Applicant: ABB RESEARCH LTD

    Inventor： CHEN MAKAN DR ,  PAUL WILLI

    IPC: C08K3/00 ,  C08K7/02 ,  C08L63/00 ,  C08L101/00 ,  H01L39/16

    Abstract: PROBLEM TO BE SOLVED: To reduce thermo-mechanical stress which occurs during cooling of a high-temperature super conducting element. SOLUTION: During cooling of the high-temperature super conducting element where an electric-conductive transition layer 3 of polymer composite material base is provided between a super conducting body 1 and an electric by-pass 2, a thermo-mechanical stress occurs at the transition layer. To reduce it and to prevent formation of crack, thermal expansion factor of the transition layer 3 is made smaller. This is done by adding a polymer composite material with an appropriate filler material 32 such as SiO2, Al2O3, or AlN.

    STRUCTURE OF HIGH-TEMPERATURE SUPERCONDUCTOR
    2.
    发明专利
    STRUCTURE OF HIGH-TEMPERATURE SUPERCONDUCTOR 失效

    公开(公告)号：JPH11195332A

    公开(公告)日：1999-07-21

    申请号：JP30420898

    申请日：1998-10-26

    Applicant: ABB RESEARCH LTD

    Inventor： CHEN MAKAN DR ,  LAKNER MARTIN DR ,  PAUL WILLI DR

    IPC: H01B12/06 ,  H01L39/16 ,  H02H9/02

    Abstract: PROBLEM TO BE SOLVED: To provide a ceramic high-temperature superconductor used for a current limiter on an alternating current line. SOLUTION: A ceramic high-temperature superconductor 1 has a bypass layer 2 having electrical resistance larger than decuple of that of a pure noble metal. The noble metal bypass layer 2 (preferably, silver) of the high- temperature superconductor 1 is allayed with a base metal (preferably, Pb, Bi, Ga) by heat treatment. The ratio of thickness d2 of the noble metal bypass layer to thickness d1 of the superconductor 1 is set to be less than 1/5. A steel base metal bypass layer 3 has electrical resistance between 10 μΩ×cm and 100 μΩ×cm at 77 k and it is soldered or welded with static pressure to the noble metal containing bypass layer 2. The thickness d2 of the noble metal bypass layer and a thickness d3 of the base metal bypass layer are set to be ρ2/d2>0.5×ρ3/d3. Here, the ρ2 and the ρ3 are respectively electrical risistivities of the noble metal containing bypass layer 2 and the base metal bypass layers 3, 3'.

    HIGH-TEMPERATURE SUPERCONDUCTIVE ELEMENT AND ITS MANUFACTURING METHOD
    3.
    发明专利
    HIGH-TEMPERATURE SUPERCONDUCTIVE ELEMENT AND ITS MANUFACTURING METHOD 失效

    公开(公告)号：JP2001217470A

    公开(公告)日：2001-08-10

    申请号：JP2000368367

    申请日：2000-12-04

    Applicant: ABB RESEARCH LTD

    Inventor： CHEN MAKAN DR ,  PAUL WILLI

    IPC: H01L39/24 ,  H01L39/14 ,  H01L39/16 ,  H02H9/04

    Abstract: PROBLEM TO BE SOLVED: To provide a high-temperature superconductive element for preventing hot spots. SOLUTION: A contact formation layer (4) is provided between a high- temperature superconductor (1) and an electrical bypass (2), and contact formation layer (4) has anisotropic, electrical conductivity, thus assuring the low- contact resistance between the superconductor 1 and the bypass (2) without increasing admittance in a main current direction (3). The anisotropy is generated by the discontinuous surface of the contact formation layer (4). For example, the anisotropy is generated by the discontinuous surface in the contact formation layer (4) by separating into regions (41) that are not interconnected in the contact formation layer (4). Further, the contact formation layer (4) is applied to the superconductor (1) by cosintering or sintering post process, and then is joined or soldered to the bypass (2) by an intermediated layer (5).

    ALLOYING METHOD FOR NOBLE METAL BYPASS LAYER OF HIGH TEMPERATURE SUPERCONDUCTOR
    4.
    发明专利
    ALLOYING METHOD FOR NOBLE METAL BYPASS LAYER OF HIGH TEMPERATURE SUPERCONDUCTOR 失效

    公开(公告)号：JPH11219627A

    公开(公告)日：1999-08-10

    申请号：JP30420798

    申请日：1998-10-26

    Applicant: ABB RESEARCH LTD

    Inventor： CHEN MAKAN DR ,  LAKNER MARTIN DR ,  PAUL WILLI DR

    IPC: C23C26/00 ,  C23C2/02 ,  H01B12/06 ,  H01B13/00 ,  H01L39/16 ,  H01L39/24

    Abstract: PROBLEM TO BE SOLVED: To provide a high temperature superconductor of ceramics to be use as a current limiter of an AC line. SOLUTION: A high temperature superconductor 1 of ceramics includes a bypass layer 2 whose electric resistivity is 10 times or more greater than that of a noble metal. The noble metal bypass layer 2 (preferably, of silver) of this high temp. superconductor is turned into alloy with the base metal (preferably Pb, Bi, Ga, Al) of an alloy metal layer 3 through a heat treatment. Before heat treatment, a plurality of methods are exhibited to apply the alloy metal layer 3 to the noble metal bypass layer 2. The layer thickness d1 of the high temp. superconductor 1 is adjusted so as to be smaller than 500 μm. The ratio to d1 of the thickness d2 of the noble metal bypass layer 2 should be adjusted so as to be smaller than 1/5.

    5.
    发明专利
    未知

    公开(公告)号：DE19746976A1

    公开(公告)日：1999-05-12

    申请号：DE19746976

    申请日：1997-10-24

    Applicant: ABB RESEARCH LTD

    Inventor： CHEN MAKAN DR ,  LAKNER MARTIN DR ,  PAUL WILLI DR

    IPC: H01B12/06 ,  H01L39/16 ,  H02H9/02 ,  H01B12/02 ,  H01F6/02 ,  H01F36/00

    Abstract: The high temperature super conductor (1) has a bypass layer (2) of rare earth material. The super conductor layer is of silver alloyed with Pb,Bi or Ga. The thickness (d2) of the bypass layer is less than one fifth of that of the super conductor which in the range of 0.5micron to 2mm. The by pass layer is covered by a layer of steel.

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