Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (6): 127 doi: 10.1007/s41365-016-0127-1

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

A Mössbauer investigation of nano-NiFe alloy/expanded graphite for electromagnetic shielding

Wei Liu 1 · Yu-An Huang 2 · Lai Wei 1 · Ya Zhai 3 · Rui-Li Zhang 1 · Tao Tang 1 · Run-Sheng Huang 1   

  1. 1 School of Physics, Nanjing University, Nanjing 210093, China
    2 Department of Material Engineering, Nanjing Institute of Technology, Nanjing 211167, China
    3 Department of Physics, Southeast University, Nanjing 211102, China
  • Contact: Run-Sheng Huang E-mail:rhuang@nju.edu.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (Nos. 50977042 and 10904061), the “863” program of MSTC (No. 2006AA03Z458) and the research funds for Nanjing Institute of Technology (No. YKJ201002).

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Wei Liu, Yu-An Huang, Lai Wei, Ya Zhai, Rui-Li Zhang, Tao Tang, Run-Sheng Huang. A Mössbauer investigation of nano-NiFe alloy/expanded graphite for electromagnetic shielding.Nuclear Science and Techniques, 2016, 27(6): 127     doi: 10.1007/s41365-016-0127-1
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Abstract:

A new material is prepared by impregnating the expanded graphite (EG) into ethanol solutions of metal acetate and then drying and reducing it in H2. It contains the EG and the nanoparticles of the magnetic Ni–Fe alloy for the electromagnetic shielding. Its morphology, phase structure, magnetic properties, and electromagnetic shielding effectiveness (SE) are investigated in our experiment. It shows that the morphology, the phase structure, and the magnetic property of the composite can be modified by altering the Ni content in the alloy nanoparticles. Interestingly, the SE can be enhanced to 54–70 dB at low frequencies (300 kHz–10 MHz) by dispersing the magnetic nanoparticles onto EG.

Key words: Expanded graphite, Nano-NiFe alloy, Electromagnetic shielding, M?ssbauer spectra