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- W4386002989 abstract "The absorbers with strong absorption capacity, wide effective absorption bandwidth (EAB), low filling, lightweight and thin thickness are the future development direction of electromagnetic wave (EMW) absorption field. NiCo2O4/CF composites were synthesized by simple hydrothermal method and calcination method in this study. X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and vector network analyzer (VNA) were used to study the crystal structure, microstructure, surface chemical states and microwave absorption properties of the composites, respectively. Carbon fiber (CF) was used as nucleation carrier, and NiCo2O4 formed a dense conductive network on its surface in the shape of nanoneedles. In addition, there are abundant oxygen vacancies and heterogeneous interfaces on the surface of composite materials, which can cause dipole polarization and interface polarization and lead to more dissipation of electromagnetic wave energy. The minimum reflection loss (RLmin) of the NiCo2O4/CF composite is -59.75 dB at the thickness of 2.01 mm. The maximum effective absorption bandwidth (RL < -10dB) of the composite is 4.12 GHz (8.84-12.96 GHz) at the thickness of 2.18 mm. In the thickness range of 1.2-5 mm, the effective absorption frequency range of the composite material accounted for 80.78% of the measurement range (3.46-18 GHz), which covered the whole C-band, X-band and Ku-band, as well as a portion of the S-band. NiCo2O4/CF composites have the characteristics of strong absorption and wide absorption bandwidth due to the synergistic effect of dielectric loss and magnetic loss, good impedance matching characteristics and more Debye relaxation processes, which provide new inspiration for the structure and component design of lightweight microwave absorbing materials (MAMs)." @default.
- W4386002989 created "2023-08-20" @default.
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- W4386002989 date "2023-12-01" @default.
- W4386002989 modified "2023-10-12" @default.
- W4386002989 title "Synthesis of NiCo2O4/CF composites with heterogeneous interfaces as excellent microwave absorbers" @default.
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- W4386002989 doi "https://doi.org/10.1016/j.mtcomm.2023.106919" @default.
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