Abstract
A set of Ag-sheathed Bi-2223 (Bi1.72Pb0.34Sr1.85Ca1.99Cu3Ox) tapes was produced using the powder in tube technique and two heat treatments separated by a mechanical deformation. For the second heat treatment, a two step annealing process was used with the first step at 825°C and the second at different temperatures from 725 to 800 ° C, an additional tape was produced by a slow cooling ramp after annealing at 825 ° C. These tapes were studied by the way of magneto-optical imaging (MOI). This “local’ technique provides results which correlate and clarify the results obtained by other “global” techniques (XRD, magnetization, critical current Jc, critical temperature Tc). The MO results show better superconducting properties (higher Jc, good shielding properties) for the slow cooled sample and for the sample which was annealed at 750 ° C during the second step.
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© 2004 Springer Science+Business Media Dordrecht
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Roussel, M., Pan, A.V., Zeng, R., Liu, H.K., Dou, S.X., Johansen, T.H. (2004). Optimization of Bi-2223 Tape Fabrication Procedure With Help Of Magneto-Optical Imaging. In: Johansen, T.H., Shantsev, D.V. (eds) Magneto-Optical Imaging. NATO Science Series, vol 142. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1007-8_16
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DOI: https://doi.org/10.1007/978-94-007-1007-8_16
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-1998-2
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