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Iron based carbon nanocomposites for electromagnetic wave absorber with wide bandwidth in GHz range

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Abstract

The electromagnetic wave absorption properties of resin compacts containing 40 vol. % composite powders of α-Fe/C(a), and Fe3C/C(a) were characterized in a frequency range of 0.05–26.5 GHz, according to a conventional reflection/transmission technique. The real part (εr ′) and the imaginary part (εr ′′) of relative permittivity were constantly low in the 2–14 GHz (εr ′= ∼12.4 and εr ′′= ∼0.6) for α-Fe/C(a) resin composites, and in the 1–26.5 GHz (εr ′= ∼9.6 and εr ′′= ∼0.8) for Fe3C/C(a) ones. The imaginary part (μr ′′) of relative permeability exhibited wide peaks in the 1–9 GHz range for α-Fe/C(a), and in the 2–26.5 GHz range for Fe3C/C(a) owing to their different magnetocrystalline anisotropy field values. Consequently, the resin compacts with 40 vol. % α-Fe/C(a), and Fe3C/C(a) powders provided good electromagnetic wave absorption performances (reflection loss <-20 dB) in ranges of 4.3–8.2 GHz, and 9–26.5 GHz over absorber thicknesses of 1.8–3.3 mm, and 1.0–2.4 mm, respectively.

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Authors and Affiliations

  1. Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan

    J.R. Liu, M. Itoh, T. Horikawa & K. Machida

  2. Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan

    E. Taguchi & H. Mori

Authors
  1. J.R. Liu
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  2. M. Itoh
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  3. T. Horikawa
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  4. E. Taguchi
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  5. H. Mori
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  6. K. Machida
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Corresponding author

Correspondence to K. Machida.

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PACS

76.50.+g; 61.46.+w; 75.50.Bb; 75.30.Gw; 75.20.En

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Liu, J., Itoh, M., Horikawa, T. et al. Iron based carbon nanocomposites for electromagnetic wave absorber with wide bandwidth in GHz range. Appl. Phys. A 82, 509–513 (2006). https://doi.org/10.1007/s00339-005-3417-8

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  • DOI: https://doi.org/10.1007/s00339-005-3417-8

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