Dielectric Performance of UHMWPE-MgFe2O4 Composites Depending on Polymer Crystallinity, and the Concentration andSize of Mechanochemically Synthesized Ferrite Particlesстатья
Аннотация:Mechanochemically synthesized particles of two types of magnesium ferrites, one of whichwith structural distortions and an average size of 170 nm, and another that is highly crystalline withan average size of 900 nm, were introduced into a matrix of ultra-high-molecular-weight polyethylenevia the milling processing. The final material has been formed by hot pressing mechanocompositesbased on ultra-high-molecular-weight polyethylene and magnesium ferrite particles of various finenessand concentration. Structural characteristics were studied using scanning electron microscopy,differential scanning calorimetry and X-ray diffraction analysis. The dielectric properties of the obtainedcomposites were analyzed by testing the frequency dependence of the permeability, dielectriclosses, and conductivity. The effect of filler concentration and particle size, as well as the crystallinityof the polymer, on the dielectric properties of the composite material were studied.
