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Oxide superconductor and method for manufacturing same

專利號
US12161054B2
公開日期
2024-12-03
申請人
KABUSHIKI KAISHA TOSHIBA（JP Tokyo）
發(fā)明人
Takeshi Araki; Hirotaka Ishii
IPC分類
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.

說明書

These coating solutions were dissolved in ion-exchanged water at a metal ion molar ratio of 0.00:1.00:2:3 and 0.22:0.78:2:3 and were mixed and stirred with a reaction equimolar amount of CF3COOH, and the obtained mixed solution was put in an eggplant-shaped flask, and reacted and purified under reduced pressure in a rotary evaporator for 12 hours. Translucent blue substances 2Mi-Pr0.00Y1.00BCO (substance described in Example 2, 0% Pr, 100% Y Material with impurity) and 2Mi-Pr0.22Y0.78BCO were obtained.

About 7 wt. % of water or acetic acid which is reaction by-products during solution synthesis was contained in the obtained translucent blue substances 2Mi-Pr0.00Y1.00BCO and 2Mi-Pr0.22Y0.78BCO. 20 times by weight of anhydrous methanol was added to translucent blue substances 2Mi-Pr0.00Y1.00BCO and 2Mi-Pr0.22Y0.78BCO and dissolved, and the coating solutions 2CSi—Pr0.00Y1.00BCO (coating solution described in Example 2, 0% Pr, 100% Y Material with impurity), and 2CSi—Pr0.22Y0.78 BCO were each obtained.

When the obtained coating solutions 2CSi—Pr0.00Y1.00BCO and 2CSi—Pr0.22Y0.78BCO were reacted and purified again under reduced pressure in a rotary evaporator for 12 hours, translucent blue substances 2M-Pr0.00Y1.00BCO (substance described in Example 2, 0% Pr, 100% Y Material without impurity) and 2M-Pr0.22Y0.78BCO were each obtained.

權(quán)利要求

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