• 제목/요약/키워드: $MgB_2$ 초전도

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$MgB_2/Fe$ 선재의 초전도성에 대한 열처리 조건과 Mg 분말의 영향 (Influence of Magnesium Powder and Heat Treatment on the Superconducting Properties of $MgB_2/Fe$ Wires)

  • ;김남규;김이정;전병혁;김찬중
    • Progress in Superconductivity
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    • 제9권1호
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    • pp.1-4
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    • 2007

  • The most common technique to fabricate $MgB_2$ superconducting wire is by powder-in-tube (PIT) technique. Therefore, the starting powder for the processing of $MgB_2$ superconductors is an important factor influencing the superconducting properties and performance of the conductors. In this study, the influence of magnesium precursor powders and annealing temperatures on the transition temperatures ($T_c$) and critical current densities ($J_c$) of $MgB_2/Fe$ wires was investigated. All the $MgB_2/Fe$ wires were fabricated by in situ PIT process. It was found that higher $J_c$ was obtained for $MgB_2$ wires with smaller particle size of magnesium precursor powders. The $J_c$ also increases with decreasing annealing temperatures.

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