Abstract Carbon nanotubes loaded Fe3O4 (CNTs-loaded Fe3O4) composites synthesized via a common chemical vapor deposition method showed excellent electromagnetic wave absorption performance. The effect of different Fe3O4 content on the electromagnetic parameters and wave absorption properties of the CNTs-loaded Fe3O4 composites was investigated. The results indicated that the CNTs-loaded Fe3O4 composites with the content of 42.4% Fe3O4 exhibited the best absorption property among the as-synthesized CNTs-loaded Fe3O4 composites. The minimum RL value reached −35.9 dB at 7.12 GHz with a thickness of 3 mm. More significantly, the effective bandwidth less than −10 dB was 4.32 GHz with a thickness of 1.5 mm. Compared with pure CNTs or Fe3O4, the impedance matching of CNTs-loaded Fe3O4 composites is markedly improved. The absorbing mechanism is mainly due to the synergistic effect of improved impedance matching, interface scattering, dielectric loss and magnetic loss. CNTs-loaded Fe3O4 composites with excellent electromagnetic wave absorption performance contribute to the development of light and highly efficient electromagnetic wave absorbing materials.

中文翻译：

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碳纳米管负载Fe3O4复合材料的制备及其电磁波吸收性能

摘要 通过常见的化学气相沉积方法合成的碳纳米管负载 Fe3O4（CNTs-loaded Fe3O4）复合材料显示出优异的电磁波吸收性能。研究了不同Fe3O4含量对碳纳米管负载Fe3O4复合材料电磁参数和吸波性能的影响。结果表明，在合成的 CNTs 负载 Fe3O4 复合材料中，Fe3O4 含量为 42.4% 的 CNTs 负载 Fe3O4 复合材料表现出最好的吸收性能。最小 RL 值在 7.12 GHz 时达到 -35.9 dB，厚度为 3 mm。更重要的是，小于-10 dB 的有效带宽为 4.32 GHz，厚度为 1.5 mm。与纯碳纳米管或 Fe3O4 相比，载有 CNTs 的 Fe3O4 复合材料的阻抗匹配得到显着改善。吸收机制主要是由于改进的阻抗匹配、界面散射、介电损耗和磁损耗的协同作用。具有优异电磁波吸收性能的碳纳米管负载Fe3O4复合材料有助于开发轻质高效的电磁波吸收材料。