在纳米结构, (RE) BCO 基,涂层导体中显著提高了临界电流密度和固定力
1Laboratory for Heteroepitaxial Growth of Functional Materials & Devices, Department of Chemical & Biological Engineering, State University of New York (SUNY) at Buffalo, Buffalo, NY, USA. agoyal@buffalo.edu.
Nature communications
|August 7, 2024
概括
研究人员设计了高温超导电线的缺陷,实现了创纪录的临界电流密度 (Jc) 和固定力 (Fp). 这一突破提高了性能,使得这些先进的电线在融合能源等应用中更具商业可行性.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 超导电性 超导电性 超导电性
背景情况:
- 高温超导电线对于融合能源,电网,国防,医疗和运输领域的大规模应用至关重要.
- 当前的价格/性能指标阻碍了在这些苛刻的应用中广泛采用涂层导体线.
- 超导膜的缺陷工程是提高性能的一个关键策略.
研究的目的:
- 为了研究在异质质地沉积的高温超导薄膜中临界电流密度 (Jc) 的极限.
- 通过缺陷工程来提高涂层导体线的性能,用于长度制造.
- 为了实现商业可行性,提高Jc和固定力 (Fp) 值.
主要方法:
- 通过 (RE) BCO 薄膜中自组装的 BaZrO3 纳米柱进行缺陷工程.
- 在涂层导体基板上的异质积.
- 在各种磁场和温度 (4.2 K到77 K) 中测量Jc(H,T) 和Fp(H,T).
主要成果:
- 记录Jc值:在4.2K (自场) 时达到190MA/cm2,在4.2K (7T) 时达到90MA/cm2.
- 在20K观察到的高Jc:超过150MA/cm2 (自场) 和超过60MA/cm2 (7T).
- 记录了特殊的固定力:在4.2 K时约6.4 TN/m3,在20 K时约4.2 TN/m3 (两者都在7 T).
结论:
- 缺陷工程方法在高温超导膜中显著增强了Jc和FP.
- 这些创纪录的性能指标证明了商业超导电线的实质性改进的潜力.
- 提高性能导致更有利的价格/性能比率,为更广泛的商业应用铺平了道路.
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