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Melt Growth of Bi-Sr-Ca-Cu-O Superconducting Sheets and Filaments

  • T. F. Ciszek
  • C. D. Evans

Abstract

We utilized a liquid-phase process for the solidification of high-Tc superconducting sheets and filaments from a melted mixture of the oxide powders Bi2O3, SrO, CaO, and CuO in approximately 1:2:2:2 molar ratios. Alumina sheets up to 13-mm wide and various filament materials with diameters ranging from 100 µm to 2.5 mm were coated with thin Bi-Sr-Ca-Cu-O layers by passage through the liquid mixed oxides and subsequent solidification. Coating rates between 2 and 1800 mm/min were used, and film thicknesses between 5 µm and 500 µm were attained. After annealing at 875°C for several hours, the coatings exhibited a superconducting transition onset near 80 K. We also report on a Bi-Sr-Ca-Cu-O wire casting technique.

Keywords

Continuous Coating Sheet Coating Melted Mixture Solar Energy Research Institute Thin Film Deposition Technique 
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References

  1. 1.
    T.F. Ciszek, J.P. Coral, C.D. Evans, and H. Katayama-Yoshida, J. of Crystal Growth 91 (1988) 312.ADSCrossRefGoogle Scholar
  2. 2.
    R.B. Goldfarb, T.F. Ciszek, and C.D. Evans, J. Appl. Phys. 64 (1988) 5914.ADSCrossRefGoogle Scholar
  3. 3.
    T.F. Ciszek and E. Tarsa, elsewhere in this publication.Google Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • T. F. Ciszek
    • 1
  • C. D. Evans
    • 1
  1. 1.Solar Energy Research InstituteGoldenUSA

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