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<p>This study developed cobalt-chromium ferrite–carbon fiber (CoCrFeO₄–CF) cement composites with enhanced electromagnetic wave absorption. At 10% CoCrFeO₄–CF content, the composite showed optimal performance: compressive strength increased to 58.37&#xa0;MPa, electrical resistivity decreased by 11.2%, and reflection loss reached − 14.56&#xa0;dB at 13.6&#xa0;GHz (7.68&#xa0;dB improvement over plain cement). The material exhibited balanced dielectric (tan <i>δ</i><sub>e</sub> = 0.24–0.32) and magnetic losses (tan <i>δ</i><sub>m</sub> = 0.31–0.41). Microstructural analysis confirmed uniform dispersion of CoCrFeO₄–CF without new phase formation. The 3&#xa0;cm-thick samples demonstrated the best absorption, suggesting potential for structural electromagnetic shielding applications.</p>

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Design and microwave absorption properties of cement-based composites with CoCrFeO₄–carbon fiber hybrid absorbers

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Yao Li,
  • Yonggang Deng,
  • Yunpeng Cui,
  • Bo Pang,
  • Yuanquan Yang

摘要

This study developed cobalt-chromium ferrite–carbon fiber (CoCrFeO₄–CF) cement composites with enhanced electromagnetic wave absorption. At 10% CoCrFeO₄–CF content, the composite showed optimal performance: compressive strength increased to 58.37 MPa, electrical resistivity decreased by 11.2%, and reflection loss reached − 14.56 dB at 13.6 GHz (7.68 dB improvement over plain cement). The material exhibited balanced dielectric (tan δe = 0.24–0.32) and magnetic losses (tan δm = 0.31–0.41). Microstructural analysis confirmed uniform dispersion of CoCrFeO₄–CF without new phase formation. The 3 cm-thick samples demonstrated the best absorption, suggesting potential for structural electromagnetic shielding applications.