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<p>The phases, electromagnetic properties, and microstructure of a silane- modified activated carbon @ZnFe<sub>2</sub>O<sub>4</sub> binary nanocomposite were investigated using X-ray diffraction, scanning electron microscopy, FT-IR, and a vector network analyzer. The microwave absorption properties in the frequency range of 7.5–11.4&#xa0;GHz were measured at room temperature. The results showed that increasing the amount of activated carbon in a composite material increases the complex permittivity, which affects the microwave absorbance. Silane-modified AC@ZnFe<sub>2</sub>O<sub>4</sub> composites with a thickness of 1.8&#xa0;mm have a minimum reflection loss of − 1.3&#xa0;dB at 7.5&#xa0;GHz, and a maximum reflection loss of − 15.6&#xa0;dB at 9.3&#xa0;GHz (from 7.5 to 11.4&#xa0;GHz). The exceptional microwave absorption properties of the unique composite material suggest that it could be a new candidate for a lightweight electromagnetic wave absorption material.</p>

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Investigation of the Microwave Absorption Properties of Silane-Modified Activated Carbon @ ZnFe2O4 Binary Nanocomposite

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • G. Jayanthi,
  • V. Andal,
  • M. Prabaharan,
  • Karthick Kannan,
  • Sivaraj Murugan

摘要

The phases, electromagnetic properties, and microstructure of a silane- modified activated carbon @ZnFe2O4 binary nanocomposite were investigated using X-ray diffraction, scanning electron microscopy, FT-IR, and a vector network analyzer. The microwave absorption properties in the frequency range of 7.5–11.4 GHz were measured at room temperature. The results showed that increasing the amount of activated carbon in a composite material increases the complex permittivity, which affects the microwave absorbance. Silane-modified AC@ZnFe2O4 composites with a thickness of 1.8 mm have a minimum reflection loss of − 1.3 dB at 7.5 GHz, and a maximum reflection loss of − 15.6 dB at 9.3 GHz (from 7.5 to 11.4 GHz). The exceptional microwave absorption properties of the unique composite material suggest that it could be a new candidate for a lightweight electromagnetic wave absorption material.