Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of Bi-2212/$SrSO_4$ Composite Superconductors by Melting Powder Mixtures

  • Kim, Kyu-Tae (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Jang, Seok-Hern (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Lim, Jun-Hyung (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Park, Eui-Cheol (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Joo, Jin-Ho (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Lee, Hoo-Jeong (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Hong, Gye-Won (The Department of Electronic Engineering, Korea Polytecnic University) ;
  • Kim, Chan-Joong (Nuclear Naonmaterials Development Laboratory, Korea Atomic Energy Research Institute) ;
  • Kim, Hye-Rim (Power System Laboratory, Korea Electric Power Research Institute) ;
  • Hyun, Ok-Bae (Power System Laboratory, Korea Electric Power Research Institute)
  • Published : 2006.09.24
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Abstract

We fabricated Bi-2212/$SrSO_4$ composite superconductors and evaluated the effects of the powder mixing method and melting temperature on their microstructure and superconducting properties. The Bi-2212 powders were mixed with $SrSO_4$ by hand-mixing (HM) and planetary ball milling (PBM) and then the powder mixtures were melted at $1100^{\circ}C{\sim}1200^{\circ}C$, solidified, and annealed. We found that the powder mixture prepared by PBM was finer and more homogeneously mixed than that prepared by HM, resulting in more homogeneous microstructure and smaller $SrSO_4$ and second phases after annealing.

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