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K. Hense, H. Kirchmayr, P. Kovàc, R. Lackner, M. Müller, W. Pachla, J. Pitel, M. Polák, P. Usak:
"Preparation and characterization of Bi-2223 tapes";
Physica C: Superconductivity and its Applications, 392-396 (2003), 1007 - 1010.

Preparation and characterization of Bi-2223 tapes

K. Hensea, H. Kirchmayra, P. Ková [Image] b, R. Lackner [Corresponding Author Contact Information] , [E-mail The Corresponding Author] , a, M. Müllera, W. Pachlac, J. Pitelb, M. Polákb and P. Usakb

a Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040, Vienna, Austria
b Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska 9, SK-84239, Bratislava, Slovakia
c High Pressure Research Center, Polish Academy of Sciences, Sokolowska 27, PL-00102, Warszawa, Poland

Received 13 November 2002; accepted 27 January 2003. ; Available online 23 May 2003.


Abstract

In a concerted action between Austrian, Slovakian and Polish research institutes Bi-2223 tapes have been prepared and characterized by different physical methods. Metallographic studies by optical as well as electron microscopy, measurements of critical current (angle dependent) and losses have been performed. Properties of individual filaments extracted from multifilamentary tapes were also studied. Uniformity of local IC of these filaments were considerably lower than that of the whole tape. This indicates that improvement of filament homogeneity could improve the over all JC in tapes. The application of these tapes for optimized magnet coils will also be discussed. From these investigations a better understanding of the mechanisms, limiting the critical current could be achieved and more optimized preparation methods can be envisioned.

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