Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
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CMP 방법으로 제조한 BSCCO 2212 튜브의 임계전류특성에 미치는 열처리 온도의 영향

Effects of Heat-treatment Temperature on the Critical Current of BSCCO 2212 Tube Prepared by CMP Method

  • Choi, Jung-Suk (Nuclear nanomaterials development laboratory, Korea Atomic Energy Research and Institute) ;
  • Oh, Sung-Young (Nuclear nanomaterials development laboratory, Korea Atomic Energy Research and Institute) ;
  • Jun, Byung-Hyuk (Nuclear nanomaterials development laboratory, Korea Atomic Energy Research and Institute) ;
  • Kim, Hyoung-Seop (Department of Metallurgical Engineering Chungnam National University) ;
  • Kim, He-Lim (Advanced Technology Center, Korea Electric Power Research Institute) ;
  • Hyun, Ok-Bae (Advanced Technology Center, Korea Electric Power Research Institute) ;
  • Kim, Chan-Joong (Nuclear nanomaterials development laboratory, Korea Atomic Energy Research and Institute)
  • 발행 : 2006.10.31
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초록

[$Bi_2Sr_2Ca_1Cu_2O_x$](BSCCO 2212) tubes were fabricated by centrifugal melting process(CMP). BSCCO 2212 powder was melted in a Pt crucible and solidified in a rotating steel mold. The BSCCO 2212 tube samples separated from steel mold were heat-treated at $800^{\circ}C\;and\;810^{\circ}C$ in oxygen flow. The critical current($I_c$) of the samples was measured by transport measurement at 77K, and the microstructure was investigated by scanning electron microscope. The $J_c$ at 77K of the tubes heated treated at $800^{\circ}C\;and\;810^{\circ}C$ were 197 and 240 $A/cm^2$, respectively. It was observed that the plate like grains in BSCCO 2212 tube was more developed in the sample heat treated at $810^{\circ}C\;and\;800^{\circ}C$ heated tube. It is found that the critical current($I_c$) of the BSCCO 2212 sample was dependent on the heating schedule regarding the growth of the BSCCO 2212 grains.

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