Fabrication and dielectric characterization of barium hexaferrite/UHMWPE composite for energy storage applications

Barium hexaferrite (BaM)/ultrahigh molecular weight polyethylene (UHMWPE) composite with remarkably high electrical charge storage capabilities has been developed. The BaM particles were synthesized by the chemical co-precipitation approach followed by sintering at high temperatures. The composites were prepared by dry compounding followed by molding at high temperature and pressure. The BaM nanoparticles were localized at the surface of the UHMWPE microparticles and consequently formed a mesh-like network of honeycomb structure within the composite matrix. The impedance analysis showed that the composite filled with only 2 wt% BaM exhibits a dielectric (epsilon') constant and dissipation factor (tan delta) of 116 and 0.01, respectively, revealing that this composite is attractive for electric charge storage applications.