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镁扩散制备Pr6O11掺杂的 MgB2块体临界电流密度和磁场性能研究
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西安理工大学,西安理工大学,西部超导材料科技股份有限公司超导材料制备国家工程实验室,西部超导材料科技股份有限公司超导材料制备国家工程实验室,西北有色金属研究院超导材料研究所,西北有色金属研究院超导材料研究所

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Improved critical current density and magnetic properties of Pr6O11-doped MgB2 bulks synthesized by Mg-diffusion method
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Xi’an University of Technology,Xi’an,Xi’an University of Technology,Xi’an,National Engineering Laboratory for Superconducting Materials,Western Superconducting Technologies Co,Ltd,Xi’an,National Engineering Laboratory for Superconducting Materials,Western Superconducting Technologies Co,Ltd,Xi’an,Research Center of Superconducting Material,Northwest Institute for Nonferrous Metal Research,Xi’an,Research Center of Superconducting Material,Northwest Institute for Nonferrous Metal Research,Xi’an

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    摘要:

    采用镁扩散方法制备了Pr6O11纳米颗粒添加的MgB2超导块体,研究了Pr6O11掺杂对其临界电流密度(Jc),不可逆磁场(Hirr)和上临界磁场(Hc2)的影响。实验结果表明Pr6O11纳米颗粒掺杂明显提高了块体的Jc,Hirr和Hc2,但没有降低其超导转变温度Tc。在20 K自场条件下,质量比为1 wt.% Pr6O11掺杂的MgB2块体的Jc较没掺杂样品提高了将近5倍, Jc=3.61×105A/cm2。在10 K温度下,MgB2块体Hc2 和Hirr较没掺杂样品分别提高了1.9 T and 2.6 T。同时讨论了Pr6O11纳米颗粒掺杂对MgB2块体的电性能和磁通钉扎机制的影响。

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    The effects of the addition of Pr6O11 nanopowder on the critical current density (Jc), irreversibility field (Hirr) and upper critical field (Hc2) of the MgB2 bulks prepared by a Mg-diffusion method were investigated. The experimental results showed that Jc, Hirr and Hc2 of the MgB2 bulks have been enhanced systematically by Pr6O11 nanopowder doping, but the superconducting transition temperature (Tc) was little affected. At 20 K in a self-field, the Jc value for the 1 wt.% Pr6O11-doped MgB2 sample was 3.61×105A/cm2, which was nearly five times larger than the undoped sample. In addition, at 10 K, the Hc2 and Hirr of the bulk increased by 1.9 T and 2.6 T, respectively. The Pr6O11-dopingmechanism on superconductivity and flux pinning was also discussed.

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邵晖,单迪,潘熙锋,闫果,王庆阳,熊晓梅.镁扩散制备Pr6O11掺杂的 MgB2块体临界电流密度和磁场性能研究[J].稀有金属材料与工程,2018,47(10):2976~2979.[Hui Shao, Di Shan, Xifeng Pan, Guo Yan, Qingyang Wang, Xiaomei Xiong. Improved critical current density and magnetic properties of Pr6O11-doped MgB2 bulks synthesized by Mg-diffusion method[J]. Rare Metal Materials and Engineering,2018,47(10):2976~2979.]
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  • 收稿日期:2017-10-24
  • 最后修改日期:2018-08-29
  • 录用日期:2018-06-07
  • 在线发布日期: 2018-11-08
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