| 无定形C掺杂对MgB2微结构和超导电性的影响 |
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| 引用本文： | 孙昱艳,张平祥,白质明,陈思华.无定形C掺杂对MgB2微结构和超导电性的影响[J].东北大学学报(自然科学版),2010,31(8):1153-1156. |
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| 作者姓名： | 孙昱艳 张平祥 白质明 陈思华 |
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| 作者单位： | 东北大学,材料与冶金学院,辽宁,沈阳,110004;东北大学,理学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划项目，国家自然科学基金资助项目 |
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| 摘 要： | 采用原位法粉末装管工艺制备了MgB2-xCx/Nb/Cu单芯线材.通过X射线衍射(XRD)、扫描电镜(EMS)和物性测试仪(PPMS)等手段研究了无定形C掺杂对线材微观结构及超导电性的影响.结果显示,随着C掺杂量的增加,进入MgB2晶格的C含量增加,MgB2层间结构不变.样品性能达到实用化超导磁体要求,在温度30 K外场0.2 T条件下,C掺杂量x=0,0.05,0.10,0.15的样品临界电流密度分别达8.1×104,1.7×105,1.6×105和1.0×105A/cm2.实验表明最佳C掺杂量x在0.05与0.10之间.
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| 关 键 词： | MgB2-xCx/Nb/Cu单芯线材 化学掺杂 微观结构 超导电性 原位法粉末装管工艺 |
Effect of Amorphous Carbon-Doping on Microstructure and Superconductivity of MgB_2 Wires |
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| SUN Yu-yan,ZHANG Ping-xiang,BAI Zhi-ming,CHEN Si-hua.Effect of Amorphous Carbon-Doping on Microstructure and Superconductivity of MgB_2 Wires[J].Journal of Northeastern University(Natural Science),2010,31(8):1153-1156. |
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| Authors: | SUN Yu-yan ZHANG Ping-xiang BAI Zhi-ming CHEN Si-hua |
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| Institution: | SUN Yu-yan1,ZHANG Ping-xiang1,BAI Zhi-ming2,CHEN Si-hua2(1.School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China,2.School of Sciences,China.) |
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| Abstract: | The amorphous carbon-doped MgB2-xCx/Nb/Cu single-core wires were prepared by in-situ PIT(powder in tube) method,where the C-doping content x=0,0.05,0.10 and 0.15.Phase formation and microstructure of the wire samples with different doping contents were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),and so on.It was found that the C content entering into MgB2 lattice increases with increasing carbon doping content,while the interlayer structure of MgB2 changes little.Electric properties... |
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| Keywords: | MgB2-xCx/Nb/Cu wires chemical doping microstructure superconductivity in-situ PIT(powder in tube) |
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