Synthesis and characterization of SrTiO3/BaFe12O19/Polyaniline core–shell nanocomposites and its investigation of microwave absorbing properties

The composite films of barium ferrite and strontium titanat are successfully prepared using core-shell method.In this work, first, Barium ferrite has been prepared from sol–gel method on SrTiO3 by core-shell structure. Second, SrTiO3/BaFe12O19/Polyaniline (PANI) nanocomposites with magnetic behavior were synthesized byin situ polymerization of aniline in the presence of SrTiO3/BaFe12O19 nanoparticles. The morphology,magnetic and microwave (MW) absorption properties of the composite films with the different weight ratio of BaFe12O19 to SrTiO3 and SrTiO3/BaFe12O19/Polyaniline are investigated with atomic force microscopy,vibrating sample magnetometry and vector network analyzer. The obtained samples were characterized byX-ray diffraction (XRD) and transmission electron microscopy (TEM). The MW region include, particularlythe range of wavelength 8-12 GHz (X-band). Core-shell method is convenient method for preparing combined absorbents. Nanocomposites were prepared to investigate the adsorption was studied in mentioned area. Absorption results are in the range of wavelength 8-12 GHz and best absorption is in the 9.7 GHz frequency with -19 dB reflection loss.

Keywords:

Microwave absorption , Core-shell , Nanocomposites , Barium ferrite , strontium titanat