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<p>Carbonized melamine foam has been recognized as a promising material for microwave absorption due to its exceptional thermal stability, lightweight, and remarkable dielectric properties. In this study, we investigated the impact of nitric acid oxidation on the surface of carbonized melamine foam and its microwave absorption properties. The treated foam exhibits optimal reflection loss of −21.51 dB at 13.20 GHz, with an effective absorption bandwidth of 7.04 GHz. The enhanced absorption properties are primarily attributed to the strengthened dielectric loss, improved impedance matching, and increased polarization losses resulting from the oxidized surfaces. This research demonstrates a promising new approach for research into surface treatments to improve the performances of microwave absorbers.</p>

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Nitric acid oxidation treatment promoting microwave absorption performance of carbonized melamine foam

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • Ming-zhen Mao,
  • Peng-kun Xia,
  • Lei Ma,
  • Sheng-xiang Huang,
  • Xiao-hui Gao,
  • Lian-wen Deng

摘要

Carbonized melamine foam has been recognized as a promising material for microwave absorption due to its exceptional thermal stability, lightweight, and remarkable dielectric properties. In this study, we investigated the impact of nitric acid oxidation on the surface of carbonized melamine foam and its microwave absorption properties. The treated foam exhibits optimal reflection loss of −21.51 dB at 13.20 GHz, with an effective absorption bandwidth of 7.04 GHz. The enhanced absorption properties are primarily attributed to the strengthened dielectric loss, improved impedance matching, and increased polarization losses resulting from the oxidized surfaces. This research demonstrates a promising new approach for research into surface treatments to improve the performances of microwave absorbers.