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<p>Metal-organic framework (MOF)-derived carbon materials exhibit numerous advantages, including excellent dielectric properties and chemical stability, in the field of electromagnetic absorption. Nevertheless, such materials are overly reliant on the dielectric loss mechanism for electromagnetic wave attenuation, a characteristic that leads to poor impedance matching performance, thereby hindering the achievement of ideal electromagnetic absorption efficacy. To address these drawbacks and broaden the application prospects of MOF-based materials, this study employs an oil bath method to introduce NiFe<sub>2</sub>O<sub>4</sub> into AlN–Co/NPC, aiming to optimize the impedance matching and magnetic loss properties of the material. Consequently, NiFe<sub>2</sub>O<sub>4</sub>–AlN–Co/NPC composites are successfully fabricated. The results demonstrate that the NiFe<sub>2</sub>O<sub>4</sub>–AlN–Co/NPC composite with a NiFe<sub>2</sub>O<sub>4</sub> loading of 10 wt% exhibits the optimal reflection loss performance. A minimum reflection loss (RL<sub>min</sub>) of −47.87&#xa0;dB is achieved at 13.04&#xa0;GHz with a thickness of 3.9&#xa0;mm, and the corresponding effective absorption bandwidth reaches 2.16&#xa0;GHz. This research provides a novel strategy for the design of simple yet efficient MOF-based microwave absorption materials and offers experimental and scientific foundations for the development of wave-absorbing materials with electromagnetic synergistic effects.</p>

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Study on preparation and microwave absorbing properties of NiFe2O4–AlN–Co/NPC composite material

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Sheng Wang,
  • Wen-tao Xu,
  • Wen-wen Xu

摘要

Metal-organic framework (MOF)-derived carbon materials exhibit numerous advantages, including excellent dielectric properties and chemical stability, in the field of electromagnetic absorption. Nevertheless, such materials are overly reliant on the dielectric loss mechanism for electromagnetic wave attenuation, a characteristic that leads to poor impedance matching performance, thereby hindering the achievement of ideal electromagnetic absorption efficacy. To address these drawbacks and broaden the application prospects of MOF-based materials, this study employs an oil bath method to introduce NiFe2O4 into AlN–Co/NPC, aiming to optimize the impedance matching and magnetic loss properties of the material. Consequently, NiFe2O4–AlN–Co/NPC composites are successfully fabricated. The results demonstrate that the NiFe2O4–AlN–Co/NPC composite with a NiFe2O4 loading of 10 wt% exhibits the optimal reflection loss performance. A minimum reflection loss (RLmin) of −47.87 dB is achieved at 13.04 GHz with a thickness of 3.9 mm, and the corresponding effective absorption bandwidth reaches 2.16 GHz. This research provides a novel strategy for the design of simple yet efficient MOF-based microwave absorption materials and offers experimental and scientific foundations for the development of wave-absorbing materials with electromagnetic synergistic effects.