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Oxide superconductor and method for manufacturing same

專(zhuān)利號(hào)
US12161054B2
公開(kāi)日期
2024-12-03
申請(qǐng)人
KABUSHIKI KAISHA TOSHIBA（JP Tokyo）
發(fā)明人
Takeshi Araki; Hirotaka Ishii
IPC分類(lèi)
H10N60/85; H10N60/01
技術(shù)領(lǐng)域
ybco,pr,region,in,coating,film,ococh3,oxide,perovskite,μm
地域： Tokyo

摘要

An oxide superconductor of an embodiment includes an oxide superconducting layer including a first superconducting region containing barium, copper, and a first rare earth element, having a continuous perovskite structure, and extending in a first direction, a second superconducting region containing barium, copper, and a second rare earth element, having a continuous perovskite structure, and extending in the first direction, and a non-superconducting region disposed between the first and the second superconducting region, containing praseodymium, barium, copper, and a third rare earth element, a ratio of the number of atoms of the praseodymium to a sum of the number of atoms of the third rare earth element and the number of atoms of the praseodymium which is 20% or more, having a continuous perovskite structure continuous with the perovskite structure of the first superconducting region and the perovskite structure of the second superconducting region, and extending in the first direction.

說(shuō)明書(shū)

It seems that the AC loss reduction technology is mostly used in the environment where the superconducting current is changed. In that case, it is preferable that the artificial pin that reduces the influence of the magnetic field exists in the superconducting region. A method such as a clustered atomically substituted artificial pin (CARP) (Japanese Patent No. 6374365, T. Araki, et. Al. Supercond. Sci. Technol. 31 (2018) 065008 (8pp)), which is spontaneously created rather than a method for injecting foreign objects from the outside such as BaZrO3 is considered to be more advantageous for the manufacturing of superconducting films.

The difference between the elements of YBCO and CARP is that CARP is the one that substitutes only 8% of the Y site which occupies only ?. Although there is contraction due to a change in a valence of Pr, the change in the lattice length is not much different from that of the original YBCO, the common perovskite structure is formed as shown by the experimental results, and the formation of the a/b-axis oriented particles seems to be suppressed due to the AC loss reduction structure that does not form voids.

Example 6

According to the flowchart illustrated in FIG. 3, two types of coating solutions for superconductors are synthesized and purified. Powders of each hydrate of 99% purity of Pr(OCOCH3)3, 99% purity of Y(OCOCH3)3, 99% purity of Ba(OCOCH3)2, and 99% purity of Cu(OCOCH3)2 in metal acetate were used.

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