Fabrication of Bi-2223 Superconducting Joint by Hot-Pressing Process
Fabrication of Bi-2223 Superconducting Joint by Hot-Pressing Process
复制标题
热压工艺制造Bi-2223超导接头
DOI：
10.1109/tasc.2023.3251299
复制
发表时间：
2023
影响因子：
1.8
通讯作者：
Kitaguchi Hitoshi
中科院分区：
文献类型：
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作者：
Takeda Yasuaki;Nishijima Gen;Kobayashi Kensuke;Kitaguchi Hitoshi
采用热压工艺制备了Bi-2223超导带材的超导接头，并进行了24 h热处理。我们开发了专门的设备，在热处理过程中对接头施加压力。热压是有效的，即使通过短的热处理，产生实用的临界电流。闭环中的超导接头在4.2 K的自场下显示出7.3 × 10−15Ω的电阻。在4.2K时，回路中可能流动的最大持续电流估计为约170 A。超导接头中中间层的纯化和进一步致密化是需要解决的问题。一旦这些问题得到解决，热压工艺应该是一个有前途的方法，用于制造高性能的Bi-2223超导接头在短的处理时间内的高产量。
Superconducting joints between Bi-2223 tapes were fabricated by a hot-pressing process with a 24 h heat treatment. We developed specialized equipment to apply pressure to the joint during the heat treatment. Hot pressing is effective for producing practical critical current even by the short heat treatment. The superconducting joint in a closed-loop showed a resistance of 7.3 × 10−15Ω at 4.2 K in self-field. The maximum persistent current that could flow in the loop was estimated to be about 170 A at 4.2 K. The purification and further densification of the intermediate layer in the superconducting joint are issues that need to be addressed. Once these issues are addressed, the hot-pressing process should be a promising method for fabricating high-performance Bi-2223 superconducting joints in high yields within a short processing time.