Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
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Bi2212/Ag 선재의 초전도 특성에 대한 열처리의 영향

Effect of Heat Treatment on Superconducting Properties on Bi2212/Ag Wire

  • Kim, S.C. (Nexans Korea Ltd.) ;
  • Ha, D.W. (Korea Electrotechnology Research Institute) ;
  • Song, K.J. (Korea Electrotechnology Research Institute) ;
  • Oh, S.S. (Korea Electrotechnology Research Institute) ;
  • Lee, N.J. (Korea Electrotechnology Research Institute) ;
  • Han, I.Y. (Nexans Korea Ltd.) ;
  • Oh, J.G. (Korea Electrotechnology Research Institute) ;
  • Sohn, H.S. (Kyungpook National University)
  • 발행 : 2006.10.31
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초록

We have fabricated double stacked 385 filamentary Bi2212/Ag round wires which have different Ag ratios. The wires have been heat-treated at the maximum temperature($T_{max}$) of $882{\sim}896^{\circ}C$ for 0.5 h. Effect of heat treatment on critical current density and critical temperature on Bi2212/Ag round wires has been studied. Critical current density of the wire heat -treated at $890^{\circ}C$ showed 206,250 $A/cm^2$ at 4.2 K, 0 T and critical temperature of the wire was 83 K. Microstructure of the wires also has been studied via optical microscopy and SEM.

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