한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제11권6호
  • /
  • Pages.493-501
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  • 1998
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

Ag와 $Y_2BaCuO_5$ 가 고온초전도체의 임계특성에 미치는 영향

The Effects of Ag and $Y_2BaCuO_5$ on Critical Characteristics of $YBa_2Cu_3O_X$ Fabricated by MPMG Method

  • 임성훈 (전북대학교 전기공학과)
  • 발행 : 1998.06.01
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초록

$YBa_2Cu_3O_X$ samples were fabricated by MPMG(Melt Powdered Melt Growth). Intitial composition of the mixed powders were prepared as follow ; $YBa_2Cu_3O_X$ : $Y_2BaCuO_5$ = 1:0, 1:0.2, 1:0.3, 1:0.4. After the first melt and cooling, 5wt% to 20wt% fo Ag power was added to the powder. Effects of the different initial $Y_2BaCuO_5$ and Ag addition amount on $J_c$ and magnetization of $YBa_2Cu_3O_X$ fabricated by MPMG method were investigated. The critical current density increased with the amount of $Y_2BaCuO_5$ and Ag. It was also observed that the difference between negative and positive magnetization in the magnetization hysteresis measurement at 77K was larger than the case where $Y_2BaCuO_5$and Ag were not added to the $YBa_2Cu_3O_X$ powders. It is concluded that $Y_2BaCuO_5$ sample with 40wt% amount of $Y_2BaCuO_5$ and 20wt% amount of Ag has not only the largest $J_c$ but also the improved pinning effect.

키워드

참고문헌

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