ELECTROMAGNETIC INTERFERENCE (EMI) SHIELDING PERFORMANCE OF THE TERNARY COMPOSITE BASED ON BAFE₁₂O₁₉, MWCNT AND PANI AT THE KU-BAND

Abstract

Abstract-A ternary composite, based on the M-type hexagonal barium ferrite, BaFe 12 O 19 , conducting polymer, polyaniline (PANI), carbon allotrope, and multi-walled carbon nanotube (MWCNT), was prepared through a facile in-situ polymerization process. The structural properties of the synthesized composites were characterized through XRD and FESEM analysis. PANI particles were found to be able to coat on BaFe 12 O 19 and MWCNT surfaces. The increased MWCNT wt% loading within the composite resulted in the increase of the electrical conductivity with values as high as 2.0320 S/m for sample PBM5 (25wt% MWCNT). The composite inherited the salient properties of its respective components to achieve optimum values of shielding effectiveness. The highest value of SE A recorded was 42.37 dB at 17.60 GHz. The significantly larger magnitudes of SE A than SE R suggest that the mechanism of shielding for all synthesized composites are through absorption.