Browse > Article
http://dx.doi.org/10.4313/JKEM.2005.18.5.468

Electrical Characteristics of HIS Tube Depending on Processing Parameters  

Park, Chi-Wan (충북대학교 재료공학과)
Jang, Gun-Eik (충북대학교 재료공학과)
Ha, Dong-Woo (한국전기연구원 고온 초전도팀)
Seung, Tae-Hyun (한국전력공사)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.5, 2005 , pp. 468-472 More about this Journal
Abstract
High-temperature Superconductor(HTS) tubes were fabricated in term of different processing variables such as preheating temperature, speed of mold rotation and cooling rate by centrigugal forming method. For powder melting by induction the optimum range of melting temperatures and preheating temperature were $1050{\circ}C{\sim}1100{\circ}C\;and\;550{\circ}C\;for\;30\; min$, respectively The mould roating speed was 1000 rpm. A tube was annealed at $840 {\circ}C$ for 72 hours in oxygen atmosphere. The plate-like grains were well developed along the loafing direction and typical grain size was about more than $40{\mu}$. It was found that Ic values increased with increasing the Preheating temperature and speed of mold rotation. While Ic decreased with increasing the cooling rate. The measured Ic in $50mm{\times}70mm{\times}2.5mm$ tube was about 896 Amp.
Keywords
Preheating temperature; Speed of mold rotation; Cooling rate; Ic;
Citations & Related Records
연도 인용수 순위
  • Reference
1 A. K. Ghosh and A. N. Basu, 'The influence of synthesis conditions on $Bi_2Sr_2CaCu_2-O_8$ superconductors', Supercond, Sci. Tech., Vol. 11, No.9, p, 852, 1998
2 X. Sun, W. Wu, L. Wang, G. Zhou, X.-G. Li, and Y. Zhang, 'Superconductivity and structure of $Bi_2Sr_2CaCu_2O_y$ single crystals with various oxygen content', Physica C, Vol. 282-287, Part 2, p. 839, 1997
3 T. G. Holesinger, D. J. Miller, L. S. Chu-mbley, 'Melt processing of the $Bi_2Sr_2CaCu_2O_y$, superconductor in oxygen and argon atmospheres', IEEE Transaction on Applied Superconductivity, Vol. 3, No.1, p. 1178, 1993
4 V. Plechac, J. Hejtrnanek, and V. Sima, 'The use of the Bi-2223 superconducting tubes', IEEE Transaction on Applied Superconductivity, Vol. 7, No.2, p. 703, 1997   DOI   ScienceOn
5 J. Bock, S. Gauss, A. Hobl, D. Krischel, M. Schillo, and P. Schafer, 'HTc current leads in commercial magnet systems applying Bi 2212 MCP BSCCO material', IEEE Transactionctivity, Vol. 9, No.2, p. 495, 1999