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Reduced-graphene-oxide-and-strontium-titanate-based double-layered composite: an efficient microwave-absorbing material

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Abstract

Microwave-absorbing materials based on reduced graphene oxide (r-GO)/strontium titanate were prepared by embedding in epoxy matrix. R-GO and strontium titanate were synthesized and characterized before composite fabrication. Microstructures of the constituent elements were studied by scanning electron microscopy and X-ray diffraction (XRD). Microwave absorption capabilities of the composite absorbers were investigated using a Vector Network Analyser in the range 8–12 GHz. A maximum reflection loss of −7.5 and −16.4 dB was obtained at 9.3 and 12.08 GHz, respectively, for 2% (w/w) r-GO-loaded epoxy composites. A maximum attenuation of −12.8 dB at 9.3 GHz was obtained for the strontium titanate/epoxy composite. However, double-layer composite with r-GO/strontium titanate/epoxy composition showed the maximum reflection loss of −15.1 dB at 9.47 GHz and −9.65 dB at 12.3 GHz. All the results are discussed in terms of complex permeability and permittivity. The study revealed that intrinsic conductivity and polarization of the r-GO particles and dielectric polarization of the strontium titanate within epoxy matrix contribute to the microwave absorption.

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Acknowledgement

We are grateful for the support from Director, Integrated Test Range (ITR), DRDO, Chandipur, Odisha.

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Authors and Affiliations

  1. Department of Applied Chemistry, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, 826004, India

    SUKANTA DAS, RAMESH ORAON & G C NAYAK

  2. Integrated Test Range (ITR), Chandipur, 756025, India

    SUKANTA DAS, S K SAHU & P C ROUTRAY

  3. DMSRDE, Kanpur, 208013, India

    H BASKEY

Authors
  1. SUKANTA DAS
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  2. S K SAHU
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  3. RAMESH ORAON
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  4. P C ROUTRAY
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Correspondence to G C NAYAK.

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DAS, S., SAHU, S.K., ORAON, R. et al. Reduced-graphene-oxide-and-strontium-titanate-based double-layered composite: an efficient microwave-absorbing material. Bull Mater Sci 40, 301–306 (2017). https://doi.org/10.1007/s12034-017-1368-2

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  • DOI: https://doi.org/10.1007/s12034-017-1368-2

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