Electromagnetic wave absorbing properties of magnetic particles and carbon nanomaterials reinforced composites

A RAM (Radar Absorbing Materials) composite was prepared based on hybrid fillers containing magnetic loss material with excellent oxidation resistance and high magnetization and dielectric loss material CNF with controllable permittivity and high dispersibility. As the loading of CNF as a dielectric loss filler is increased, the permittivity is increased and the permeability of Co-CNF composites is almost same value for the fixed loading of Co as a magnetic loss filler. Highly dispersed Co and CNF as the hybridized loss materials by the dispersion processes of the homogenizer and three-roll mill enhance the efficiency of the electromagnetic wave absorbing properties. Highly dispersed magnetic particles and CNF as the hybridized loss materials enhance the efficiency of the electromagnetic wave absorbing properties at a thin thickness of 2 mm or less.