| 19芯Fe/Cu复合包套二硼化镁超导线制备及其超导性能研究 |
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| 引用本文： | 禹争光,马衍伟,王栋樑,张现平,高召顺,闫果,卢亚锋. 19芯Fe/Cu复合包套二硼化镁超导线制备及其超导性能研究[J]. 低温与超导, 2007, 35(3): 185-187,192 |
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| 作者姓名： | 禹争光 马衍伟 王栋樑 张现平 高召顺 闫果 卢亚锋 |
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| 作者单位： | 中国科学院电工研究所应用超导实验室,北京,100080;西北有色金属研究院,西安,710016 |
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| 摘 要： | 采用In-Situ PIT方法,以工业级低纯度B粉(92%)和镁粉(99%)为原料制备了19芯Fe/Cu复合包套MgB2超导线。断面扫描电镜观测表明,超导线内部超导芯分布排列均匀,Fe层都能完好包围MgB2芯体,Fe与Cu层结合紧密,填充因子0.17。750℃热处理1h后,样品超导转变温度Tc(onset)=33.5K,转变宽度ΔTc=4.8K。X光衍射检测发现,MgB2超导相中不存在其它Mg-B化合物杂项,但含有少量MgO和FeB2。多芯化后,超导芯中FeB2略有增加。四引线Ic测试发现,19芯样品在4.2K,4T时,临界电流密度为5622A/cm2,比单芯样品14400 A/cm2降低约2/3。
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| 关 键 词： | 原位粉末填管法 19芯MgB2线材 铁铜复合包套 工业级原料 |
| 修稿时间： | 2007-01-11 |
Fabrication of 19-filament Fe/Cu composite sheathed MgB2 wire and its superconductivity |
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| Yu Zhengguang,Ma Yanwei,Wang Dongliang,Zhang Xianpin,Gao Zhaoshun,Yan Guo,Lu Yafeng. Fabrication of 19-filament Fe/Cu composite sheathed MgB2 wire and its superconductivity[J]. Cryogenics and Superconductivity, 2007, 35(3): 185-187,192 |
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| Authors: | Yu Zhengguang Ma Yanwei Wang Dongliang Zhang Xianpin Gao Zhaoshun Yan Guo Lu Yafeng |
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| Affiliation: | 1.Applied Superconductivity Laboratory;Institute of Electrical Engineering;Chinese Academy of Sciences;Beijing 100080;China;2.Northwest Institute for Nonferrous Metal Research;Xi'an 710016;China |
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| Abstract: | Using low purity of amorphouse B powder(92%) and Mg powder(99%) as starting materials,19-filament Fe/Cu composite sheathed MgB2 wire with outer diameter 1.9mm was fabricated by the in situ powder-in-tube method.The sample was characterized using scanning electron microscope,X-ray diffraction and superconducting quantum interference device magnetometer,transition Jc and its magnetic dependence were evaluated by a standard four-probe technique.It is found that each filament surrounded by Fe chemical barrier i... |
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| Keywords: | In situ powder-in-tube 19-filament MgB2 superconductor Fe/Cu composite sheathed Commercial materials |
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