Microwave absorption properties of doped Ba‐hexaferrite nanoparticles in 1‐18 GHz frequency range

The complex permeability, complex permittivity and microwave absorption of BaZnxCoxZr2xFe12‐4xO19 (x= 0.0,0.1, 0.2, 0.3, 0.4, 0.5) nanoparticles were studied in the frequency range of 1 to 18 GHz. Nanoparticles were synthesizedby the co‐precipitation method in the presence of polyvinyl alcohol (PVA). X‐ray diffraction (XRD), Fourier transforminfrared spectroscopy (FTIR), scanning electron microscopy (SEM), and vector network analyzer were employed toinvestigate the desired properties of the prepared samples. The XRD and FTIR evaluations of the samples show thatnanoparticles with magnetoplumbite crystal structures have been formed in all of the cases. The reflection loss resultsindicate that the ferrite with the composition of BaZn0.5Co0.5 Zr Fe10O19 had appropriate reflection loss (RL< ‐10 dB) andbandwidth in order to be used as a potential single layer absorber in the frequency range of 8‐12 GHz.

کلیدواژه ها:

Microwave Absorption ، Ferrites ، Nanoparticle ، Co‐precipitation method