Joining method for high-temperature oxide superconducting tape wire

Able to product high-temperature oxide superconducting tape wire over several kilometers without degrading superconducting properties

Summary

　Since the discovery of a copper oxide superconductor, the hightemperature (HT) oxide superconducting tape wire that can be used for cables has been developed. Currently, a joining method that can minimize the degradation of superconducting property is required to obtain stable low resistance. However, in the case of solder joint, superconducting property degradation and joining resistance variation have been a problem due to the need of temperature adjustment to ensure wettability and pressure. It was also difficult to produce long, stable-quality HT oxide superconducting tape wire of more than several kilometers.
　This invention is able to provide a method of joining HT oxide superconducting tape wires that enables joining homogeneous or dissimilar tape wires that can suppress superconducting property degradation. This invention is characterized by the ultrasonic joining of overlapping portions of two tape wires through indium at room temperature and in an atmospheric environment.

Effects

　Joining HT oxide superconducting tape wires together while suppressing superconducting property degradation
　Produce long and stable quality HT oxide superconducting tape wires

Applicationn

・Cable, coil, magnet and magnet system

IP Data

IP No.　 ： JP2020-187999
Inventor ： HASHIZUME Hidetoshi, SATO Yutaka
keyword ： Material