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Journal of Superconductivity and Novel Magnetism

, Volume 31, Issue 4, pp 1053–1058 | Cite as

Improved Superconducting Properties in Graphene-Doped MgB2 Prepared by Coating Method

  • Haoran Liu
  • Fang YangEmail author
  • Lihua Jin
  • Shengnan Zhang
  • Qingyang Wang
  • Xiaomei Xiong
  • Jianqing Feng
  • Chengshan Li
  • Pingxiang Zhang
  • Lian Zhou
Original Paper

Abstract

The effects of graphene doping on the phase formation and superconductivity of MgB2 bulks synthesized with different process have been studied systemically. Considering the scattering structure of graphene, coating method was applied to enhance the uniformity of graphene doping. The graphene coated B addition was expected to improve the critical current density of MgB2 bulks. In our study, several experiments were performed to find out the suitable way for graphene doping. The coating method could enhance the critical current density of MgB2 from 1.9 × 105 to 2.5 × 105 A/cm2 at 20 K and 0 T, compared with that of the undoped sample. And the superconductivity of MgB2 prepared by coating method got obvious improvement at high field compared with that of pure graphene doping bulk. It can be concluded that the coating method could ensure the uniformity of graphene doping in MgB2 and refined the grain crystalline effectively.

Keywords

MgB2 superconductor Critical current density Graphene doping Microstructure Composites 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation (No 51772250 and 51372207) and the Natural Science Basic Research Plan in Shanxi Province of China (No 2017ZDJC-19).

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anChina
  2. 2.Northwest Institute for Nonferrous Metal ResearchXi’anChina

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