Barium ferrite and graphite integrated with polyaniline as effective shield against electromagnetic interference

Barium ferrite was incorporated into polyaniline matrix along with expanded graphite (EG) in order that the resultant conductive composite can be used for electromagnetic shielding. The different properties like complex permittivity (epsilon), permeability (mu), and effectiveness of shielding have been studied by vector network analyzer using theoretical enumeration given in Weir and Nicholson-Ross algorithms. The microwave absorption characteristic of the composites have been calculated in the X-band (8.2-12.4 GHz) frequency range which shows a shielding effectiveness up-to 37.1 dB, which strongly depends on dielectric loss. (C) 2016 Elsevier B.V. All rights reserved.