白丝美女被狂躁免费视频网站,500av导航大全精品,yw.193.cnc爆乳尤物未满,97se亚洲综合色区,аⅴ天堂中文在线网官网

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)

Even if a void portion having a width of 1 μm may be realized by the ablation and a non-superconducting region may be formed, the sum of the width of the decomposition oxide layer adjacent to the void portion and the width of the region where the number of oxygen changes to become non-superconducting is wider than 40 μm wide on one side of the void portion. The non-superconducting region on one side of the void portion may be 60 μm wide. Therefore, even if the void portion is narrowed from 20 μm width, each of the non-superconducting regions having a width of 40 μm on both sides of the void portion becomes wider, so the total width of the non-superconducting regions by the laser scribing method does not become 80 μm or less.

The structure formed by the above laser scribing method has problems other than the problem that the width of the non-superconducting region cannot be narrowed.

In the ablation by the laser scribing method, the decomposition oxide layer such as CuO or Y2O3 is formed around the void portion. These differ in the coefficient of thermal expansion from the YBCO oxide, and when cooled to the liquid nitrogen temperature or lower in superconducting coil applications, the peeling from the YBCO oxide is likely to occur due to the difference in the coefficient of thermal expansion.

In the first place, the above CuO or Y2O3 is generated by the decomposition from the YBCO, and there is no lattice coupling with the YBCO, and the peeling is likely to occur. As of July 2020, there have been no reports of achievement cases in which a 500 m long wire is thinned by the laser scribing method and applied to large-scale applied products and continuously operated for a long period of time, for example, 3 years or more. The above unsettled problems are believed to be relevant.

權(quán)利要求

1
微信群二維碼
意見(jiàn)反饋