Tohoku University Technology: Joining method for high-temperature oxide superconducting tape wire: T18-517
Able to product high-temperature oxide superconducting tape wire over several kilometers without degrading superconducting properties
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.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of June 1, 2025): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University
