Highly Anisotropic Filaments in BSCCO-Based Multifilamentary Tapes
Published results indicate that high-current-carrying capacities of BSCCO-based conductors have been obtained under the following conditions: (1) monofilamentary conductors with a core thickness less than 30 µm and (2) the largest possible shape factor (30 to 70). When the first condition is feasible for multifilamentary tapes, it generally corresponds to large perturbations of the filament geometry. We succeeded in making several 10-m-long tapes with good filament geometry and a shape factor of more than 60. We present results of structural examination of the filaments, phase stability during thermal treatment, and critical current density. Typical results were 430 A/mm2 at 4.2 K and 15 A/mm2 at 77 K for 45-filament Bi-2223-phase tapes.
KeywordsCritical Current Density Core Wire Silver Powder Core Thickness France Telecom
Unable to display preview. Download preview PDF.
- 5.P. Dubots, D. Legat, F. Deslandes, and B. Raveau, p. 523 in: Advances in Cryogenic Engineering—Materials, vol. 36, Plenum, New York (1989).Google Scholar
- 9.K. Sato, Sumitomo Electric Industries, Ltd., Osaka, Japan, U.S. Patent 5 114 908 (5/19/1992).Google Scholar
- 10.P. Dubots and D. Legat, Alcatel Alsthom Recherche, Marcoussis, France, Patent FR 91 04 629 (4/13/1992).Google Scholar
- 15.G. Duperray and D. Legat, paper PDB-21, Proceedings of the European Conference on Applications of Superconductivity (EUCAS ‘83) held in Göttingen, Germany October 4–8, 1993.Google Scholar