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자료유형
학술저널
저자정보
김기익 (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute) 최정숙 (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute) 오성룡 (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute) 전병혁 (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute) 김혜림 (Advanced Technology Center, Korea Electric Power Research Institute) 현옥배 (Advanced Technology Center, Korea Electric Power Research Institute) 김형섭 (Department of Metallurgical Engineering Chungnam National University) 김찬중 (Department of Nuclear Materials Development, Korea Atomic Energy Research and Institute)
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제7권 제1호
발행연도
2005.1
수록면
97 - 101 (5page)

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Bi-22l2 tubes for fault current limiter (FCL) were fabricated by centrifugal melting process. $SrSO_4$ ($10\;wt.\;\%$) was added to Bi-2212 powder to lower the melting point of Bi-22l2 and to improve the mechanical properties. The BSCCO powder was completely melted at $1300\;^{\circ}C$ using the RF furnace and then poured into rotating steel mold. The steel mold, preheated at $450\;{\circ}C{\sim}550^{\circ}C$ for 2 hour was rotated at $1020{\sim}2520\;RPM$. The solidified BSCCO tube was cooled down to room temperature in the furnace for 48 hours and separated from the mold between Bi-2212 and the mold. $ZrO_2$ solution was used to separate it easily from the mold and Ag tape was attached in the mold inner wall of the mold to analysis electrical property. Bi-22l2 tube was often cracked when the cooling rate was high. BSCCO tubes with $70{\Phi}{\times}100\;mm,\;50{\Phi}{\times}100\;mm$ and $30{\Phi}{\times}150\;mm$ size were fabricated by centrifugal melting process. The $J_{c}s$ of tubes with $50{\Phi}{\times}100\;mm{\times}4.0\;t$ and $50{\Phi}{\times}100\;mm{\times}4.l\;t$ were 178 and $74.2\;A/cm^2$ at 77K, respectively. The processing condition for Bi-2212 tube fabrication was investigated using XRD and SEM analyses.

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