Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8152495 | Journal of Magnetism and Magnetic Materials | 2018 | 14 Pages |
Abstract
In this study, carbon-based iron nitride composite is prepared by hydrothermal synthesis, in-situ polymerization and nitriding, successively. The morphology, phase and chemical structure of the composite is characterized by scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), X-ray diffractometer (XRD) and Fourier transform infrared spectrometer (FTIR). The electromagnetic and microwave absorbing property of the composites is investigated using a vibrating sample magnetometer (VSM) and a vector network analyzer (VNA). The results show that the carbon-based iron nitride composite is successfully fabricated by coating Fe4N magnetic particles with thin carbon layers. The minimum reflection loss (RL) of â44â¯dB is observed at 4.23â¯GHz (3.02â¯mm thickness), and the frequency band is 3.72-4.74â¯GHz when RLâ¯â¤â¯â10â¯dB. When the thickness is reduced to 1.00â¯mm, the effective bandwidth (RLâ¯â¤â¯â¯â10â¯dB) could still reach to 4.00â¯GHz. In summary, the carbon-based iron nitride composite shows excellent microwave absorbing property at 2-4â¯GHz with relatively thin thickness.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Linna Dai, Shengkun Xie, Meijie Yu, Lijie Ci,