Microwave absorption properties of planar-anisotropy Ce 2 Fe 17 N 3 −δ powders/Silicone composite in X-band

The soft-magnetic properties of planar-anisotropy Ce2Fe17N3-δ powders were reported, and reflection loss (RL) of the powders/Silicone composites with various volume concentrations have been studied in 0.1–18 GHz frequency range. It was found that the optimal RL of this composite absorber with a thickness of 1.72 mm is −60.5 dB at 9.97 GHz and the RL is less than −10 dB in the whole X-band (8–12 GHz). The bandwidth with RL exceeding −10 dB and −20 dB are 5.24 GHz and 1.32 GHz, respectively. Furthermore, all the optimal RL value of the composite with the thickness less than 2.13 mm can reach −20 dB in the range of 8–17 GHz, which indicates that the Ce2Fe17N3-δ/Silicone composite absorber will be a promising candidate in higher gigahertz frequency especially in X-band.