초록 ▼

최종목표:
MgB₂ 초전도 선재 제조기술 확립
1차년도
- 선재용 MgB₂ 초전도 분말합성기술
- 분말의 반응기구, 미세조직 연구: 플럭스 피닝 재료 연구
- 단선재 제작 기초 실험
- 전자장해석기술/전자기적 특성
2차년도
- 초전도 단선재 제조 조건 확립
- 플럭스 피닝 재료 역할 규명
- 초전도 특성 평가용 장치제작
- 열해석기술/접합부 특성평가
3차년도
- 금속 시스(sheath)용 재료 개발
- 단심선재 전자기적

최종목표:
MgB₂ 초전도 선재 제조기술 확립
1차년도
- 선재용 MgB₂ 초전도 분말합성기술
- 분말의 반응기구, 미세조직 연구: 플럭스 피닝 재료 연구
- 단선재 제작 기초 실험
- 전자장해석기술/전자기적 특성
2차년도
- 초전도 단선재 제조 조건 확립
- 플럭스 피닝 재료 역할 규명
- 초전도 특성 평가용 장치제작
- 열해석기술/접합부 특성평가
3차년도
- 금속 시스(sheath)용 재료 개발
- 단심선재 전자기적 특성 연구
- 다심선재 기초연구
- AC 손실평가 기초 실험
- 선재 권선, 열처리 함침, 냉각기술

Abstract ▼

Many attempts have been made to synthesize MgB₂ superconductors with the aim of improving their superconducting properties under high magnetic fields through doping with various forms of carbon such as SiC, carbon (C), hydrocarbon and carbohydrate. One of the most significant characterist

Many attempts have been made to synthesize MgB₂ superconductors with the aim of improving their superconducting properties under high magnetic fields through doping with various forms of carbon such as SiC, carbon (C), hydrocarbon and carbohydrate. One of the most significant characteristics of an MgB₂ superconductor is a lack of weak links between the grain boundaries in contrast to high-critical temperature (T_c) superconductors. In particular, the MgB₂ superconductor with smaller grain size could improve its critical properties by providing flux pinning centers with high grain boundary density.
The quality of precursor powders is an important factor influencing the superconducting properties and performance of in situ powder-in-tube (PIT) processed MgB₂ wire. In this study, the influence of magnesium and boron precursor powders and annealing temperatures on the transition temperatures (T_c) and critical current densities (J_c) of in situ MgB₂/Fe wires was investigated. J_c enhancement was observed in MgB₂/Fe wires when using a smaller particle size of the precursor powders. The critical current density increases with decreasing annealing temperatures.