Electromagnetic Properties and Impedance Matching Effect of Flaky Fe-Si-Al/Co2Z Ferrite Composite

Fe-Si-Al/Co(2)Z ferrite composites were prepared by ball-milling. The microstructure, microwave electromagnetic properties, and impedance-matching performance of a series of composites were determined and the results are discussed. Experimental results indicated that, in frequency range 1-18 GHz, the permittivity and permeability of the complexes can be adjusted by changing the Fe-Si-Al-to-Co(2)Z weight ratio. Calculated reflection losses indicate that the absorption performance of Fe-Si-Al/Co(2)Z ferrite composites is superior to that of the pure Fe-Si-Al and Co(2)Z ferrites. It was found that the impedance-matching performance of the materials, which contributes to perfect absorption, can be improved by use of an appropriate weight ratio for the Fe-Si-Al/Co(2)Z ferrite composite.