Synthesis and characterization of CoFe < inf > 2 < /inf > O < inf > 4 < /inf > /polyaniline nanocomposites for electromagnetic interference applications

Abstract

The Cobalt ferrite (CoFe2O4) powders were synthesized by Co-precipitation method. The as prepared ferrite powders were incorporated into a polyaniline matrix at various volumetric ratios. The as prepared composites of ferrite and polyaniline powders were characterized using X-ray diffraction (XRD), transmission electron microscope (TEM). The particle size of CoFe2O4 is found to be 20 nm. The saturation magnetization (Ms) of all the composites was found to be decreasing with decrease of ferrite content, while coercivity (Hc) remained at the value corresponding to pure cobalt ferrite nanopowders. The complex permittivity (ε′ and ε″) and permeability (μ′ and μ″) of composite samples were measured in the range of 1 MHz to 1.1 GHz. The value of ε′ and μy found to be increased with ferrite volume concentration. Copyright © 2014 American Scientific Publishers All rights reserved.