Influence of Porous Manganese-Containing Fillers on the Electrodynamic Characteristics of Absorbing Polymer Composite Materials

Abstract

The paper shows that the introduction of up to 6 wt % of ferromanganese dust enhances the process of granule porization and improves the structural-mechanical properties. This is achieved due to the formation of low-base calcium hydrosilicates in the mineral matrix, reinforced by crystals of fayalite, orientite and pyroximite, which contribute to an increase in the dielectric component in the scattering of electromagnetic waves in the millimeter range. Granules with a developed pore structure in the frequency range from 1102 to 3.15103 Hz can absorb and scatter electromagnetic waves in the range of 54-58 dB. Granules in the temperature range from 20 to 300 °C are flame retardant and not prone to brittle fracture (F ≤ 4). The introduction of a 5% porous filler into the polymer matrix contributes to the growth of the effective part of the dielectric permittivity (μ to 1.5) and stabilization of the coefficient of attenuation of electromagnetic waves (from 2 to 4) in the range 11010 - 61010 Hz. The developed porous material is recommended to was used as a filler in the first layers of gradient-absorbing composites