Speaker
Description
Sumitomo Electric Industries, Ltd. (SEI) has been developing the silver-sheathed Bi2223 multi-filamentary wires, DI-BSCCO (Dynamically-Innovative BSCCO). The wires have been improved various properties in response to the growing demands from the application products and projects. For use in high field-magnet applications, strong hoop stress is usually applied to HTS wire. Therefore, the wire needs to have high mechanical strength. For the purpose of using such applications, SEI has developed and commercialized a high-strength DI-BSCCO Type HT-NX wire reinforced with Ni alloy tapes. The wire obtained a critical tensile stress of 400 MPa at 77K. On the other hand, the resistivity of the Ni alloy is high, resulting in the generation of the high Joule heat at the joint. The newly developed spliced structure successfully reduced the splice resistance without sacrificing the mechanical properties. For nuclear magnetic resonance and other high field magnetic applications, the use of Type HT-NX wire is highly expected. In this presentation, the recent progress of the currently available commercial wires and the updated R&D activities will be talked.
