Ba0.69Sr0.17Cd0.07Zn0.07Fe12O19 nanostrucutres/conducting polyaniline nanocomposites; synthesis, characterization and microwave absorption performance

In this study, conductive and magnetic polyaniline (PANi) nanocomposites containing nanoparticles and nanorods with a special stoichiometry of Ba0.69Sr0.17Cd0.07Zn0.07Fe12O19 were prepared by in situ polymerization. Two different reflux and solvothermal procedures followed by heating treatments were adopted to synthesize the magnetic cores. The particle and rod morphologies in nanoscale were obtained from these methods, respectively. Ethylenediaminetetraacetic acid (EDTA) and ethylenediamine (en) were employed as the soft templates and complexing agents. The magnetic properties of the prepared samples were characterized on a vibrant sample magnetometer (VSM) with maximum saturation magnetization values of 66.59, 65.09, 46.80 and 17.07 emu/g for nanoparticles, nanorods, nanoparticle/PANi and nanorod/PANi composites, respectively. The structure of the M-type hexagonal ferrite for magnetic cores was evidenced by X-ray diffraction patterns (XRD). Meanwhile, the absorption capability of electromagnetic waves related to these composites was evaluated in the X-band (8-12 GHz). As a result of this operation, these products showed the maximum reflection loss of - 16 dB. (C) 2012 Elsevier B.V. All rights reserved.