POLYVALENT IRON OXIDE MAGNETIC NANOPOWDERS SYNTHESIZED BY ELECTROEROSION DISPERSION FOR MICROWAVE ABSORBING COATINGS

Abstract

The method for simple preparation of polyvalent magnetic iron oxide nanopowders by electroerosion dispersion (EED) of carbon steel in water will be presented. The developed low cost masking coatings based on corrosion resistant polyurethane and acrylic-urethane priming, varnishes and paints of Ukrainian manufacture (InterGasSinthez) with the addition of EED nanopowders of polyvalent iron oxides, carbon, omega spheres (based on silica and alumina), basalt fibers demonstrated high absorption abilities (90-99%) of microwaves in the wide range of frequencies (10-70 GHz, wavelength 0,03-0,0043 m) and close to zero reflection of the microwaves (-10 Db - - 23 Db or 10% -0.5%).