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Issue 8, 2014
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Microwave absorption properties of core double-shell FeCo/C/BaTiO3 nanocomposites

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Abstract

Microwave absorption properties of core double-shell FeCo/C/(x)BaTiO3 nanocomposites were investigated in the 1–18 GHz frequency range. High resolution transmission electron microscopy studies reveal the core double-shell type nanocomposite with FeCo nanoparticles as the center, while carbon and BaTiO3 are the inside and the outside shells, respectively. Enhanced relative permittivity made the core double-shell FeCo/C/(x)BaTiO3 nanocomposites with better electromagnetic impedance matching than that of a FeCo/C and BaTiO3 mixture. Reflection loss (RL) values of FeCo/C/(20 wt%)BaTiO3–paraffin composite are almost double those of the FeCo/C–paraffin composite at the absorbent thickness from 2 to 7.5 mm due to enhanced interfacial effects. The RL value of the FeCo/C/(20 wt%)BaTiO3–paraffin composite is −41.7 dB at 11.3 GHz at the absorbent thickness of 2 mm and a broad absorption bandwidth of 5.1 GHz (RL values exceeding −10 dB) covers the 9.4–14.5 GHz frequency range.

Graphical abstract: Microwave absorption properties of core double-shell FeCo/C/BaTiO3 nanocomposites

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Publication details

The article was received on 05 Aug 2013, accepted on 17 Oct 2013 and first published on 23 Oct 2013


Article type: Paper
DOI: 10.1039/C3NR04087A
Citation: Nanoscale, 2014,6, 3967-3971
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    Microwave absorption properties of core double-shell FeCo/C/BaTiO3 nanocomposites

    J. Jiang, D. Li, D. Geng, J. An, J. He, W. Liu and Z. Zhang, Nanoscale, 2014, 6, 3967
    DOI: 10.1039/C3NR04087A

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