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Multifilamentary Bi(2223) tapes: phase formation, current distribution and AC Losses

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Published in Zhou, L.; Weber, H.W. & Collings, E.W. Proceedings of the International Workshop Critical Currents in Superconductors for Practical Applications. Xi'an - March 6-8, 1997 - Singapore: World Scientific. 1998, p. 21-27
Abstract The superconducting compound Bi(2223) is actually the only one which can be obtained in a multifilamentary configuration and in sufficient lengths for industrial applications. A brief review is given about the present status of the critical current densities of multifilamentary Bi(2223) tapes reported so far, being of the order of 30'000 A/cm² and above in the superconductor, the corresponding engineering (or overall) values approaching lO'O0O A/cm². A new deformation method leading to a more homogeneous current distribution in these tapes is presented: the fourroll technique (driven turks head), which yielded jc(77K,0T) values of 26'000 A/cm². A considerable lowering of the AC losses in multifilamentary Ag/Bi(2223) tapes has been obtained introducing higly resistive, very thin "oxide barriers" based on Ag/BaZrO₃ around each filament. First results are reported at this conference.
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ISBN: 981-02-3313-2
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Proceedings chapter (Published version) (533 Kb) - document accessible for UNIGE members only Limited access to UNIGE
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FLUKIGER, René-Louis et al. Multifilamentary Bi(2223) tapes: phase formation, current distribution and AC Losses. In: Zhou, L.; Weber, H.W. & Collings, E.W. (Ed.). Proceedings of the International Workshop Critical Currents in Superconductors for Practical Applications. Xi'an. Singapore : World Scientific, 1998. p. 21-27. https://archive-ouverte.unige.ch/unige:112633

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