Abstract Massive efforts have been focused on effective electromagnetic absorbing materials, which have promising applications in suppressing or eliminating the electromagnetic radiation. In this study, Fe3O4@SiO2@PPy composites were prepared via a facile one-pot polyreaction. The results demonstrate that the composites loaded with 30 wt% possess an excellent electromagnetic absorbing property. Specifically, the minimum reflection loss value is −56.90 dB at 10.41 GHz at an absorber thickness of 3.7 mm. The broadest effective frequency bandwidth (reflection loss less than −10 dB) is 6.38 GHz at an absorber thickness of 3 mm. The outstanding performance implies that the Fe3O4@SiO2@PPy composites have a huge potential for application as advanced electromagnetic absorber with the advantages of strong absorption, wide bandwidth and low density.

中文翻译：

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聚吡咯（PPy）气凝胶包裹的Fe 3 O 4 @SiO 2 纳米颗粒：作为优良电磁吸收体的高性能材料

摘要 大量的研究工作集中在有效的电磁吸波材料上，这些材料在抑制或消除电磁辐射方面具有广阔的应用前景。在这项研究中，Fe3O4@SiO2@PPy 复合材料是通过简单的一锅聚合反应制备的。结果表明，负载量为 30 wt% 的复合材料具有优异的电磁吸收性能。具体而言，在 10.41 GHz 吸收器厚度为 3.7 mm 时，最小反射损耗值为 -56.90 dB。在吸收体厚度为 3 mm 时，最宽的有效频率带宽（反射损耗小于 -10 dB）为 6.38 GHz。优异的性能意味着Fe3O4@SiO2@PPy复合材料具有吸收强、带宽宽、密度低等优点，作为先进的电磁吸收体具有巨大的应用潜力。