Effect of Ambient Gas on Preparing Bi-Sr-Ca-Cu-O Superconductor

  • Akira Fukizawa
  • Yoshinobu Sakurai
  • Akira Ohtomo
Conference paper


Systematic decrease of the formation temperature of high Tc superconducting phase with zero resistance at 107K was observed in the Bi Pb-Sr-Ca-Cu-0 system by reducing the oxygen content in the N2/O2 mixing atmosphere following a reduction of melting temperature. Volume fraction of high Tc phase was exponentially increased with increasing heat treating time. It increased rapidly near the melting temperature but the critical current density decreased by the possible formation of weak links at the grain boundaries.


Tartaric Acid Critical Current Density Formation Temperature Large Volume Fraction Peak Intensity Ratio 


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Copyright information

© Springer Japan 1989

Authors and Affiliations

  • Akira Fukizawa
    • 1
  • Yoshinobu Sakurai
    • 1
  • Akira Ohtomo
    • 1
  1. 1.Central Research LaboratoryShowa Denko K.K.Ohta-ku, Tokyo, 146Japan

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