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<p>In this work, the dispersion of nickel particles in flexible electromagnetic wave absorption (EMWA) composites is investigated by rheological characterization. EMWA performance of flexible EMWA composites is influenced by the size, filling rate and dispersion of nickel particles. The flexible EMWA composites have the maximum effective absorption bandwidth (EAB<sub>max</sub>) of 5.88&#xa0;GHz, the minimum reflection loss (<i>RL</i><sub><i>min</i></sub>) of − 48.00 dB and the maximum radar cross section (RCS) reduction of 25.94 dB·m<sup>2</sup>. After the salt spray test for the flexible EMWA composites, EAB<sub>max</sub>, <i>RL</i><sub><i>min</i></sub> and maximum RCS reduction are 5.37&#xa0;GHz, − 41.66 dB and 25.82 dB·m<sup>2</sup>. The flexible EMWA composites retain excellent absorption performance after the salt spray test due to the improvement of impedance matching in specific frequency bands. The surface electric field intensity and power loss density increased with the increase of absorbent loading and decreased with the increase of particle size, while the magnetic field intensity shows an opposite trend of change. The flexible EMWA composites with a proper size of nickel particles can be used as flexible EMWA materials in the salt-spray environment.</p>

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Electric/magnetic field and power loss density fluctuation of flexible electromagnetic wave absorption composites with nickel particles

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Peiyu Jia,
  • Sisi Chen,
  • Xiaotian Nan,
  • Xiaogang Zhang,
  • Hanhao Xia,
  • Bicheng Zhou,
  • Cunrui Zhang,
  • Zhiyi Zhang,
  • Lan Jia

摘要

In this work, the dispersion of nickel particles in flexible electromagnetic wave absorption (EMWA) composites is investigated by rheological characterization. EMWA performance of flexible EMWA composites is influenced by the size, filling rate and dispersion of nickel particles. The flexible EMWA composites have the maximum effective absorption bandwidth (EABmax) of 5.88 GHz, the minimum reflection loss (RLmin) of − 48.00 dB and the maximum radar cross section (RCS) reduction of 25.94 dB·m2. After the salt spray test for the flexible EMWA composites, EABmax, RLmin and maximum RCS reduction are 5.37 GHz, − 41.66 dB and 25.82 dB·m2. The flexible EMWA composites retain excellent absorption performance after the salt spray test due to the improvement of impedance matching in specific frequency bands. The surface electric field intensity and power loss density increased with the increase of absorbent loading and decreased with the increase of particle size, while the magnetic field intensity shows an opposite trend of change. The flexible EMWA composites with a proper size of nickel particles can be used as flexible EMWA materials in the salt-spray environment.