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용융주조법으로 제조한 BSCCO-2212 초전도체의 공정변수 연구
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  • 용융주조법으로 제조한 BSCCO-2212 초전도체의 공정변수 연구
저자명
김규태,장석헌,임준형,주진호,김찬중,홍계원,김혜림,현옥배,Kim. Kyu-Tne,Jang. Seok-Hern,Lim. Jun-Hyung,Joo. Jinho,Kim. Chan-Joong,Bong. Gye-Won,Kim. Rye-Li
간행물명
한국세라믹학회지
권/호정보
2005년|42권 6호|pp.437-442 (6 pages)
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한국세라믹학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

We fabricated BSCCO-2212 (2212) bulk superconductor by melt casting process, and evaluated the dependence of the critical properties on the temperature and cooling .ate of mold and the pouring methods of melt. It was observed that the critical current (Ic) of 2212 was significantly dependent on the pre-heating temperature of the mold. At the pre-heating temperature of $500^{circ}C$ followed by air cooling condition, Ic of 48 A at 77 K was obtained which was higher than others processed at different temperatures. In addition, the Ic improved to 132 A when tilt casting method was applied. The improved Ic is probably due to the fact that the tilt casting reduced a turbulent flow of the melt during casting causing less porosity and more homogeneous microsructure. Critical temperature was measured to be 87-89 K after the first heat treatment and it improved to 90-91 K when subsequently heat treated at $650^{circ}C$ in a nitrogen atmosphere. This improvement was considered to be due to an optimization of the oxygen content in the range of 8.16-8.2.