POROUS MATERIALS WITH EMBEDDED NANOPARTICLES, PREPARATION METHODS AND USE THEREOF Russian patent published in 2011 - IPC C08K7/22 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to porous magnetic materials, preparation method thereof, volumetric RF-radiation absorber and three-dimensional composite material. The porous magnetic material contains: a) a polymer base based on foamed polymers, having a porous structure, and b) nanoparticles of magnetic or dielectric material embedded into the base material, where said magnetic or dielectric material is selected from a group comprising ferrites of the type MFe₂O₄ (where M = Mn, Ni, Cu), Ni-Zn ferrites, barium hexaferrite, iron-nickel alloys, Sm-Fe alloys, hard-magnetic compositions Nd-Fe-B and Sm-Co or combination thereof, with size ranging from 1 nm to 100 micrometres in amount of 0.2-15 wt %. Said nanoparticles are aligned to form continuous conductivity lines in the polymer base, which form a three-dimensional waveguide structure having at least one characteristic dimension selected from length and width of the said lines, proportional to the wavelength or range of wavelengths of the said absorbed, scattered or concentrated electromagnetic radiation.

EFFECT: obtaining material for making antennae, lenses, absorbers or concentrators, capable of absorbing, scattering or concentrating electromagnetic radiation.

21 cl, 4 ex