Electromagnetic Shielding Effectiveness of X-Type Hexaferrite-C₃N₄ Binary Nanofiller-Incorporated Poly(vinylidene fluoride) Multiphase Composites

Abstract

The significant influence of magnetic X-type hexaferrite-C3N4 binary nanofillers on the shielding effectiveness of poly(vinylidene fluoride) heterostructure composite materials has been displayed in the present report. The overall improvement in shielding effectiveness of these multiphase composite structures is immensely important for the prevention of electromagnetic pollution in the GHz frequency range. The uniqueness of this magnetic-semiconducting binary composite system helps improve the shielding effectiveness due to absorption (SEA) and reflection (SER) as well as total shielding effectiveness (SET) of the X-type hexaferrite-C3N4-PVDF heterostructure composite materials. The high magnetic loss in terms of domain wall resonance together with the eddy current loss produced by these X-type hexaferrite-C3N4 binary composite nanofillers inside the polar structure of β-phase reaches the PVDF matrix and the dielectric loss of the composite materials helps improve SEA to a maximum value of approximately −62 dB at 13.95 GHz as well as SET to a maximum value of approximately −73 dB in the X-band and approximately −88 dB in the Ku-band of the resultant composite structures. The high attenuation (>99.999999%) of these X-type hexaferrite-C3N4-PVDF heterostructure composite materials makes them the most useful for the applications in the microwave/GHz frequency region.