? 2022 Elsevier B.V.Designing components and optimizing structure is considered an effective strategy to enhance the electromagnetic wave absorption of materials. In this study, a two-step method was successfully used to fabricate Fe-metal-organic framework derived iron nitride and carbon-based composites, which combined the porous structure of metal-organic frameworks with the excellent electromagnetic properties of Fe4N. By comparing the composite samples' morphology, structure, composition characteristics, and electromagnetic properties before and after nitriding, reasons for improving electromagnetic wave absorption performance are revealed. The formation of the Fe4N phase and the porous structure optimize impedance matching, which significantly enhances the electromagnetic wave absorption capacity of the composite. When the Fe4N @ carbon composite has a matching thickness of 2 mm, the minimum reflection loss reaches ? 56 dB, and when the matching thickness is 2.5 mm, the reflection loss reaches ? 42 dB at 13.4 GHz. The effective absorption bandwidth reaches 6.7 GHz. This research brings a new design scheme for improving electromagnetic wave absorption materials.
Dielectric lossElectromagnetic wave absorptionFe-metal organic frameworksIron nitrideMagnetic loss
Wang C.、Yu M.、Liang X.、Yao Z.、Zhang Y.
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Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education State Key Laboratory of Crystal Materials Shandong University
NSTL
Elsevier
