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Proceedings chapter
English

Fabrication and microstructure of Bi(2223) multifilamentary tapes with low AC losses

Published inProceedings of the International Workshop Critical Currents in Superconductors for Practical Applications, Editors Zhou, L.; Weber, H.W. & Collings, E.W., p. 217-220
Presented at Xi'an, March 6-8, 1997
PublisherSingapore : World Scientific
Publication date1998
Abstract

Low AC losses in multifilamentary Bi(2223) tapes have been obtained introducing highly resistive, very thin "oxide barriers" based on Ag/BaZrO₃ around each filament. The transverse resistivity between neighbour filaments was enhanced by a factor 8 - 11 with respect to that of purely Ag sheathed tapes. The maximum of the AC coupling losses as a function of the frequency was found to be shifted from about 2.8 Hz for Bi(2223) tapes with pure Ag matrix to 23 Hz for tapes with oxide barriers. The actual jc (77K, 0T) values of tapes with oxide barriers are about 10'000 - 13'000 A/cm², i.e. a factor 2 - 3 lower than for our usual tapes with pure Ag sheath. The optimization of the critical current density is actually under work, taking into account the change in oxygen diffusion.

Citation (ISO format)
HUANG, Yibing et al. Fabrication and microstructure of Bi(2223) multifilamentary tapes with low AC losses. In: Proceedings of the International Workshop Critical Currents in Superconductors for Practical Applications. Xi’an. Singapore : World Scientific, 1998. p. 217–220.
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  • PID : unige:112629
ISBN981-02-3313-2
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