Progress in Superconductivity

The Korean Superconductivity Society (한국초전도학회)
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Fabrication of BSCCO Superconductor Tube for Current Lead Application

전류인입선 응용을 위한 BSCCO 초전도 튜브의 제조

  • Choi, Jung-Suk (Neutron Science Division, Korea Atomic Energy Research Institute) ;
  • Jun, Byung-Hyuk (Neutron Science Division, Korea Atomic Energy Research Institute) ;
  • Hyun, Ok-Bae (Advanced Technology Center, Korea Electric Power Research Institute) ;
  • Kim, Chan-Joong (Neutron Science Division, Korea Atomic Energy Research Institute)
  • Published : 2009.04.30
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Abstract

$Bi_2Sr_2Ca_1Cu_2O_x$(BSCCO 2212) superconductors for current lead were fabricated by centrifugal melting process(CMP). BSCCO 2212 powder was melted at $1200^{\circ}\C$ in a resistance furnace using a Pt crucible and poured in a rotating cylindrical mold preheated at $550^{\circ}\C$ for 2 hour. The solidified BSCCO-2212 samples were heat-treated by partial melting process in oxygen atmosphere. The current-voltage curves at 77 K of the samples were obtained by transport measurement, and the microstructure was investigated by scanning electron microscope. The $J_c$ values at 77 K of the tubes partially melted at $840^{\circ}C,\;860^{\circ}C\;and\;880^{\circ}C$ were 492, 430 and 398 $A/cm^2$, respectively. It was observed that the plate-like grains in BSCCO 2212 tube was more developed in the sample heat-treated at $840^{\circ}C$. It was found that the critical current of the BSCCO 2212 samples was dependent on the partial melting schedule regarding the grain shape and size of the BSCCO 2212.

Keywords

References

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