2;Pr6O11摻雜;臨界電流密度;磁場性能"/> 6O11納米顆粒添加的MgB2超導塊體,研究了Pr6O11摻雜對其臨界電流密度(Jc),不可逆磁場(Hirr)和上臨界磁場(Hc2)的影響。實驗結果表明Pr6O11納米顆粒摻雜明顯提高了塊體的Jc,Hirr和Hc2,但沒有降低其超導轉變溫度Tc。在20 K自場條件下,質量比為1 wt.% Pr6O11摻雜的MgB2塊體的Jc較沒摻雜樣品提高了將近5倍, Jc=3.61×105A/cm2。在10 K溫度下,MgB2塊體Hc2 和Hirr較沒摻雜樣品分別提高了1.9 T and 2.6 T。同時討論了Pr6O11納米顆粒摻雜對MgB2塊體的電性能和磁通釘扎機制的影響。"/>

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鎂擴散制備Pr6O11摻雜的 MgB2塊體臨界電流密度和磁場性能研究
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西安理工大學,西安理工大學,西部超導材料科技股份有限公司超導材料制備國家工程實驗室,西部超導材料科技股份有限公司超導材料制備國家工程實驗室,西北有色金屬研究院超導材料研究所,西北有色金屬研究院超導材料研究所

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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:

    采用鎂擴散方法制備了Pr6O11納米顆粒添加的MgB2超導塊體,研究了Pr6O11摻雜對其臨界電流密度(Jc),不可逆磁場(Hirr)和上臨界磁場(Hc2)的影響。實驗結果表明Pr6O11納米顆粒摻雜明顯提高了塊體的Jc,Hirr和Hc2,但沒有降低其超導轉變溫度Tc。在20 K自場條件下,質量比為1 wt.% Pr6O11摻雜的MgB2塊體的Jc較沒摻雜樣品提高了將近5倍, Jc=3.61×105A/cm2。在10 K溫度下,MgB2塊體Hc2 和Hirr較沒摻雜樣品分別提高了1.9 T and 2.6 T。同時討論了Pr6O11納米顆粒摻雜對MgB2塊體的電性能和磁通釘扎機制的影響。

    Abstract:

    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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邵暉,單迪,潘熙鋒,閆果,王慶陽,熊曉梅.鎂擴散制備Pr6O11摻雜的 MgB2塊體臨界電流密度和磁場性能研究[J].稀有金屬材料與工程,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
  • 錄用日期:2018-06-07
  • 在線發(fā)布日期: 2018-11-08
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