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<p>This study investigates the synthesis and optimization of FeSiAl@Mn<sub>0.8</sub>Zn<sub>0.2</sub>Fe<sub>2</sub>O<sub>4</sub>-MXenes composites via a one-step hydrothermal method followed by calcination annealing. The resultant composite demonstrated excellent low-frequency microwave absorption properties. X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analyses confirmed the successful formation of a stable, uniform composite structure. Scanning electron microscopy (SEM) images revealed the role of FeSiAl as a template, maintaining a two-dimensional morphology, while MXenes nanosheets and MnZn ferrite formed a heterogeneous interface post-annealing. Magnetic measurements indicated that, while FeSiAl exhibited the highest saturation magnetization, the composites maintained strong magnetization after annealing, with improved magnetic properties due to the conversion of non-magnetic hydroxides to ferrites. Electromagnetic parameter analysis showed a significant increase in the dielectric constant, attributed to polarization mechanisms, while magnetic permeability remained high and slightly increased post-annealing. The composites demonstrated superior microwave absorption performance with an optimized matching thickness, as shown by the RL values of -30 dB at 5&#xa0;mm for the AFM5 sample, and − 26 dB and − 24 dB for the AFM5-400 and AFM5-600 at 4&#xa0;mm and 5&#xa0;mm, respectively. These findings suggest that the combination of high dielectric constant and magnetic permeability is effective for optimizing low-frequency microwave absorption materials, although a trade-off exists between absorption performance and bandwidth.</p>

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Low-frequency microwave absorbing properties of FeSiAl@Mn₀.₈Zn₀.₂Fe₂O₄-MXene-based composite materials

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Changlei Zhang,
  • Zhipeng Tang,
  • Xin Yao,
  • Fang Chen,
  • Xuejing Xing,
  • Yifei Qin,
  • Qingting He,
  • Wenxin Li,
  • Xiaoqiang Feng

摘要

This study investigates the synthesis and optimization of FeSiAl@Mn0.8Zn0.2Fe2O4-MXenes composites via a one-step hydrothermal method followed by calcination annealing. The resultant composite demonstrated excellent low-frequency microwave absorption properties. X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analyses confirmed the successful formation of a stable, uniform composite structure. Scanning electron microscopy (SEM) images revealed the role of FeSiAl as a template, maintaining a two-dimensional morphology, while MXenes nanosheets and MnZn ferrite formed a heterogeneous interface post-annealing. Magnetic measurements indicated that, while FeSiAl exhibited the highest saturation magnetization, the composites maintained strong magnetization after annealing, with improved magnetic properties due to the conversion of non-magnetic hydroxides to ferrites. Electromagnetic parameter analysis showed a significant increase in the dielectric constant, attributed to polarization mechanisms, while magnetic permeability remained high and slightly increased post-annealing. The composites demonstrated superior microwave absorption performance with an optimized matching thickness, as shown by the RL values of -30 dB at 5 mm for the AFM5 sample, and − 26 dB and − 24 dB for the AFM5-400 and AFM5-600 at 4 mm and 5 mm, respectively. These findings suggest that the combination of high dielectric constant and magnetic permeability is effective for optimizing low-frequency microwave absorption materials, although a trade-off exists between absorption performance and bandwidth.