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Research Progress of MgB2 Superconducting MaterialsPrepared by High-energy Ball Milling
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Northwest Institute for Nonferrous Metal Research,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Western Superconducting Technologies Co,Ltd,Xi’an

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    Abstract:

    Since the discovery of superconductivity at 39 K in MgB2, it has been considered as one of the most promising candidates for engineering applications due to its low material cost and relativity high critical transition temperature. However, the realization of large-scale application for MgB2 based superconducting technology essentially relies on the improvement of superconducting properties of MgB2. Some techniques have been developed to improve the critical current density, such as chemical doping, high-energy ball milling and various processing techniques. We introduce some research progress of MgB2 superconducting materials prepared by high-energy ball milling. The investigation showed high-energy ball milling is effective to obtain high density and fine grain size MgB2with high Jc performance. We also introduce that high Jc MgB2 was synthesized by two-step reaction method and high-energy ball milling. High-energy ball milling may be a good choice for reducing the void percentage and enhancing the average density in MgB2 long wires.

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[Yang Fang, Yan Guo, Zhang Pingxiang, WangQingyang, Xiong Xiaomei, Li Shaoqiang, Feng Jianqing, Li Chengshan, Feng Yong. Research Progress of MgB2 Superconducting MaterialsPrepared by High-energy Ball Milling[J]. Rare Metal Materials and Engineering,2017,46(5):1452~1456.]
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History
  • Received:January 22,2015
  • Revised:March 03,2015
  • Adopted:March 25,2015
  • Online: September 27,2017

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