The Microwave Absorption Properties of Fe16N2 Nanoparticles
IEEE Transactions on Magnetics(2022)
摘要
Using Fe nanoparticles as raw material, we manufactured Fe
16
N
2
nanoparticles by hydrogen reduction and ammonia nitriding process. X-ray diffractometer (XRD) and Mössbauer spectroscopy analyses show that the prepared nanoparticles are composed of Fe
16
N
2
and
$\alpha $
-Fe. The proportion of the Fe
16
N
2
phase could reach 75%, and the saturation magnetization of the nanoparticles reaches 197 emu/g. The Fe
16
N
2
nanoparticles are mixed with paraffin, and the microwave absorption properties of the composites are measured. The reflection loss (RL) of the Fe
16
N
2
/paraffin composite can reach −18.3 dB at 4.8 GHz, with a thickness of 2.2 mm. The ratios of the magnetic loss and dielectric loss are 40% and 59%, respectively. Only 1% (100%–40%–59%) of the incident microwave energy is reflected, which shows Fe
16
N
2
/paraffin composite is a potential candidate for microwave absorbing materials.
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关键词
Composite materials,electromagnetic wave absorption,soft magnetic materials
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