Electromagnetic Properties of Fe-Cr-Si-Al Magnetic Flake/Co2Z Ferrite Powder Composites
片状Fe-Cr-Si-Al 磁粉/Co2Z铁氧体粉末混合组分的电磁特性

The gas atomized Fe-Cr-Si-Al (SMSS) alloy powder was flattened by mechanical milling, and Ba3Co2Fe24O41(Co2Z) hexagonal ferrite powder was synthesized by a citrate sol-gel process, respectively. The products were characterized by SEM and XRD. Furthermore, the complex permittivity and complex permeability of SMSS /Co2Z composites with various mass ratios were measured within 2.0--8.2 GHz. The results show that the complex permittivity and complex permeability substantially decrease with the increase of Co2Z powder fraction in the composites. Meanwhile, the calculated reflection loss (RL) curve indicates that the matching frequency shifts to high value, and when the mass ratio of SMSS/Co2Z is 4/1, the sample possesses a minimum RL value.