| 非铁磁性管套法硼化镁带材的基本物理特性 |
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| 引用本文： | 刘珏,周迪帆,曾敏,朱红妹,张义邴.非铁磁性管套法硼化镁带材的基本物理特性[J].低温与超导,2009,37(4). |
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| 作者姓名： | 刘珏 周迪帆 曾敏 朱红妹 张义邴 |
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| 作者单位： | 上海大学理学院物理系,上海,200444 |
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| 摘 要： | 采用粉末管套法,在不锈钢、铜和铝非铁磁性金属管套中制备了MgB2超导带材。电阻温度特性测量表明,以不锈钢管为包套制备的MgB2超导带材具备较好的电输运性能:临界转变温度最高(Tc=33.7K)、转变宽度最窄(零电阻转变ΔTc=1.2K,完全抗磁转变Tm=1.9K)。XRD测量显示,三种管套都能够使MgB2良好成相,MgB2和MgO相的相含量比例R(SS、Cu、A l)分别为7.15、2.45、3.77,样品中MgO相应该是Mg和管套中残余的氧反应的结果,铜管和铝管中还分别检测到了Cu2Mg和A l3Mg2相。对不锈钢管套MgB2带材的热导率测量显示,在超导转变温度以下热输运能力单调下降,满足多晶导体内热运动随温度变化的理论结果。
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| 关 键 词： | MgB2 超导线带材 粉末管套法 热导率 |
Properties of superconducting MgB_2 wires made by PIT method with non-ferromagnetic materials |
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| Liu Jue,Zhou Difan,Zeng Min,Zhu Hongmei,Zhang Yibing.Properties of superconducting MgB_2 wires made by PIT method with non-ferromagnetic materials[J].Cryogenics and Superconductivity,2009,37(4). |
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| Authors: | Liu Jue Zhou Difan Zeng Min Zhu Hongmei Zhang Yibing |
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| Affiliation: | Department of Physics;College of Science;Shanghai University;Shanghai 200444;China |
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| Abstract: | Employing the powder-in-tube(PIT) method and non-ferromagnetic tubes of stainless steel(SS),copper(Cu) and aliuminium(Al),superconducting MgB2 wires were manufactured.The resistance-temperature(R-T) measurement indicated that MgB2 wires in SS tubes exhibited better electric transport properties: a higher critical temperature(Tc=33.7K) and a narrower transition width(zero-resistance transition Tc =1.2K,antimagnetic transition Tm =1.9K).XRD patterns showed that MgB2 phase was formed in the three types of non-... |
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| Keywords: | MgB2 |
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