Fabrication of Bi2212 superconductor by Centrifugal Forming Process

원심 성형법에 의한 고온초전도체 제조

  • 정승호 (충북대학교 재료공학과) ;
  • 장건익 (충북대학교 재료공학과)
  • Published : 2002.07.01

Abstract

BSCCO 2212 HTS was fabricated by CFP(centrifugal forming process). The powder was initially ground in the mixing ratio of 2:2::1:2 with 10% of SrSO$_4$. The temperature increased up to 1035$^{\circ}C$ and 1200$^{\circ}C$ for melting. The melt was poured into the preheated and rotating copper mould from 200 to 600$^{\circ}C$. The specimen was not broken by thermal impact when the melting temperature was over 1050$^{\circ}C$ and copper mould was preheated over 400$^{\circ}C$ for 30min. A tube type of specimen was annealed at 840$^{\circ}C$ or 860$^{\circ}C$ in oxygen atmosphere for 24hours. Typical microstructure was analyzed in terms of CFP parameters by XRD, SEM, and EDS and also superconducting characteristics were compared.

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