Oxide superconductor and method for manufacturing same
摘要
說(shuō)明書
In the TFA-MOD method, the a/b axis oriented particles that reduce the superconducting characteristics are thought to be caused by excessive nucleation due to the release of excess unit cells, and in the AC loss reduction structure using voids, the characteristics of superconductors are decrease. In the method for reducing an AC loss by forming a void, the formation of a/b axis oriented particles in the superconductor portion is considered to be 100 μm from the void, and the ratio of a/b axis oriented particles in that portion reaches 30% or more. When the a/b axis oriented particle reaches 30%, the superconducting characteristics become almost zero, but when the a/b axis oriented particle is calculated as 1/100, in the case of the superconducting wire having a width of 400 μm and a structure that reduces the AC loss by forming voids, the a/b axis oriented particles are formed with a width of 200 μm, and the characteristics are 1/100, so the overall characteristics of the wire having a width of 400 μm are reduced to 50.5%. Moreover, when the width becomes shorter and becomes 200 μm, the entire surface becomes a/b axis oriented particles, so the characteristic becomes 1/100.
In the example, the a/b axis oriented particle maintains the normal amount of 1.2% by not forming voids. In addition, it is expected that the a/b axis oriented particles will not be formed even if the non-superconducting region becomes narrower, and it is understood that the structure can realize a large AC loss reduction effect.
