刘浩然,金利华,杨芳,王庆阳,熊晓梅,冯建情,李成山,周廉.石墨烯掺杂MgB2块材超导性能和微观结构的研究[J].稀有金属材料与工程,2019,48(4):1256~1259.[liuhaoran,jinlihua,yangfang,wangqingyang,xiongxiaomei,fengjianqing,lichengshan,zhoulian.Effect of graphene doping on the superconducting properties and microstructure of MgB2 bulks[J].Rare Metal Materials and Engineering,2019,48(4):1256~1259.]
石墨烯掺杂MgB2块材超导性能和微观结构的研究
投稿时间:2017-09-04  修订日期:2017-11-20
中文关键词:  超导材料  MgB2  临界电流密度  磁通钉扎
基金项目:国家自然科学基金(51772250和51372207)项目, 陕西省自然科学NO.2017ZDJC-19
中文摘要:
      因为原材料相对低廉,综合制冷成本和材料成本,MgB2在20-25 K,1-3 T的中低磁场范围内应用具有明显的技术优势,有希望在这一工作温区替代传统的低温超导材料和氧化物高温超导材料,应用前景十分广泛。随着超导材料实用化的到来,对MgB2性能的要求也在逐渐提高,而影响它性能的主要因素磁通钉扎强度和晶粒连接性成为了人们的研究重点。本文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三种方法,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。
Effect of graphene doping on the superconducting properties and microstructure of MgB2 bulks
英文关键词:superconducting material  MgB2  critical current density  flux pinning force
英文摘要:
      Magnesium diboride (MgB2), which has the great technology advantage at 20-25 K and 1-3 T, is a promising material compared with other metallic superconductors and high-temperature superconductors due to its low cost raw material and without liquid helium. In order to meet the requirement of pratical applications, it is necessary to increase the superconducting properties of MgB2, so the flux pinning properties and intergrain connectivities have become the focus of researchers. In this work, MgB2 bulks with graphene, graphene-acetone solution, graphene coating B doping were synthesiszed and the microstructure, critical current density, flux pinning properties were studied systematically. The critical current density by graphene doping directly got significant enhancement at low field. However, the superconduting properties for samples synthesiszed by solution process and coating method did not improved obviously due to the oxidation decreased the activity of B powders.
作者单位E-mail
刘浩然 西北工业大学凝固技术国家重点实验室 forwardhaoran@163.com 
金利华 西北有色金属研究院  
杨芳 西北有色金属研究院  
王庆阳 西北有色金属研究院  
熊晓梅 西北有色金属研究院  
冯建情 西北有色金属研究院  
李成山 西北有色金属研究院  
周廉 西北工业大学凝固技术国家重点实验室  
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