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Characteristics of HTS Tube Depending on Chemical Compositions
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  • Characteristics of HTS Tube Depending on Chemical Compositions
  • Characteristics of HTS Tube Depending on Chemical Compositions
저자명
Jung. Seung-Ho Jung,Jang. Guneik Jang
간행물명
한국초전도·저온공학회논문지
권/호정보
2003년|5권 1호|pp.27-30 (4 pages)
발행정보
한국초전도저온공학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The Bi2212 based HTS tubes with 4 different compositions, Bi:Sr:Ca:Cu = 2.0:2.0:1.0:2.0, 2.1:2.0:1.0:2.0,2.2:1.8:1.0:2.0 and 2.2:1.8.1.0.2:2 with 10% of SrSO$_4$ were studied. For tube fabrication the optimum range of melt temperatures and preheating temperature and time for mold were 105$0^{circ}C$~110$0^{circ}C$ and 55$0^{circ}C$ for 30min respectively. The mold rotating speed was 1000rpm. Typical tube dimension was 30/24mm in outside/inside diameter and 60mm in length. A tube was annealed at 84$0^{circ}C$ for 40 hours in oxygen atmosphere. The plate like grains more than 20${mu}{ extrm}{m}$ were well developed along the rotating direction of mold regardless of initial chemical compositions. The specimen with Bi2212 composition exhibited $T_c$ of 83K while the specimen with other compositions are lower than 60K. The measured $I_c and J_c$ at 77K(B = 0T) in Bi2212 composition were about 80A and 266A/$ extrm{cm}^2$.