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石墨烯掺杂对MgB2块材微观结构和超导性能的影响

Liu Haoran,Jin Lihua,Yang Fang,Wang Qingyang,Xiong Xiaomei,Fen Jianqing,Li Chengshan,Zhou Lian

RARE METAL MATERIALS AND ENGINEERING（2019）

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Abstract
通过直接掺杂石墨烯、石墨烯包覆硼掺杂、石墨烯丙酮溶液掺杂3种方法, 系统研究了石墨烯采用不同方法掺杂时MgB2块材的晶体结构、临界电流密度 (Jc) 、磁通钉扎性能 (Fp) .通过直接掺杂, MgB2在低场下临界电流密度值得到了明显提高, 而包覆法和溶液法掺杂石墨烯由于在空气中氧化严重并没有改善MgB2超导性能.
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Key words
superconducting material,MgB2,critical current density,flux pinning force
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