用于高场应用的基于铁的超导体:实现高工程临界电流密度的实现
Peng Yang1,2, He Huang1,3, Meng Han1
1Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Materials (Basel, Switzerland)
|November 9, 2024
概括
研究人员使用粉末在管中的方法开发了先进的基于铁的超导磁带. 这些磁带实现了创纪录的工程关键电流密度,证明了它们在实际磁铁应用中的潜力.
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:
- 基于铁的超导体提供高的上临界场,低的异构性,并通过粉末在管 (PIT) 路线可制造,使它们对磁铁应用具有前景.
- 工程关键电流密度 (Je) 对于评估超导材料在实际应用中的性能和将研究与开发联系起来至关重要.
研究的目的:
- 使用一种新的热压 (HP) 技术,制备 Ag-sheathed Ba0.6K0.4Fe2As2 (Ba-122) 铁基超导带.
- 优化带制造参数,特别是增加填充系数和减少银含量,以提高工程关键电流密度 (Je).
主要方法:
- 使用绘制,平面和热压 (HP) 热处理制造Ag的Ba-122超导磁带.
- 系统地研究不同HP压力对带特性和微观结构的影响.
- 运输关键电流密度 (Ic) 和工程关键电流密度 (Je) 在4.2K和10T的表征.
主要成果:
- 在磁带中达到约40%的填充系数,降低了银体积分数和总体成本.
- 确定了导致高运输的最佳HP参数Je.
- 在4.2K,10T的Ba-122电线和磁带上,证明了4.1 × 10^4 A/cm^2 (Ic = 350 A) 的工程临界电流密度 (Je) 的记录.
结论:
- 开发的Ba-122超导磁带表现出极好的性能,为此类材料达到迄今为止报告的最高Je.
- 优化制造过程,包括增加填充因子和控制HP,是提高超导性能的关键.
- 基于铁的超导体显示出未来实际应用的巨大潜力,特别是在高磁场技术中.
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