Abstract
It is necessary to increase the Jc values when developing practical MgB2 superconducting wire. High Jc values even in high magnetic fields were achieved using nanometer-sized Mg powder. The highly pure nanometer-sized Mg powder was fabricated using the thermal plasma method. In addition, doping with a small amount of SiC was tried for the purpose of enhancing Jc properties. The MgB2 superconducting wires were MgB2/Fe tapes prepared from a mixture of nanometer-sized Mg, commercial amorphous B and SiC, which were fabricated using the in-situ PIT method. The Jc values of the non-doped and 10 at% SiC-doped tapes reached 90 and 250 A/mm2 at 4.2 K and 10 T, respectively. In regard to the temperature dependence of Jc, it reached at 160 A/mm2 at 20 K and 4 T which nears the practical application level.
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