Microwave attenuation properties of Z-type barium ferrite nanoparticles |
Paper ID : 1605-UFGNSM-FULL |
Authors: |
Abstract: |
Z-type barium hexaferrite Ba (3)Mn(0.4) Ni(0.1 )Co(1.5) Fe(24) O(41) was synthesized by sol- gel method. X ray diffraction (XRD), Mössbauer spectroscopy, vibrating sample magnetometry (VSM), transmission electron microscope (TEM), electron diffraction and vector network analyzer were used to analyze the structures electromagnetic and microwave absorption properties. The ferrite–polymer composites with different ferrite ratios of 50%, 60%, 70% and 80% in polyvinylchloride matrix were prepared. Based on microwave measurements of reflectivity, Ba Mn Ni Co Fe O is a good candidate for electromagnetic compatibility and other practical applications in frequency range from 12 to 20 GHz. It should be noted that thicknesses of the absorbers are only 1.8mm. TEM micrograph indicate that nanocrystalline particles were formed with a hexagonal shape of about 30 nm of grain size. Ultrafine particle sizes were approximately 70 nm. Mössbauer characterizations were performed in the transmission geometry, using a conventional spectrometer in a constant acceleration mode, with the gamma rays provided by a 57Co(Rh) source. The Mössbauer spectra were analyzed with a non-linear least-square routine, with Lorentzian line shape. |
Keywords: |
ferrite, nanoparticles, nanocomposite,magnetic properties, |
Status : Paper Accepted (Poster Presentation) |