Поглотители электромагнитного излучения СВЧ-диапазона на основе частиц Fe и Fe – Al, полученные в поле вращающихся магнитных диполей

Abstract

The purpose of the work is to obtain microwave absorber materials based on Fe – Al particles and to study its absorbing characteristics. Composite materials consisting of Fe, Fe – Al particles and a paraffin matrix were obtained by rotational magnetic field method. The mechanism of the field of rotational magnetic dipoles usage for Fe particles coating with Al nanoparticles and further composite material synthesis was described. Microstructure, mechanical, magnetic and dielectric properties and parameters of microwave absorption of obtained composite materials were investigate. Magnetic and dielectric permittivity in the frequency range 8 – 12 GHz were obtained. The influence of the field of rotational magnetic dipoles in combination with Al nanoparticles allows to obtain more durable structure in comparison with composite materials without Al nanoparticles. It was found that composite materials have a good radio-absorbing properties in the studied frequency range. The maximal value of S21 = –27,9 dB was obtained on 12 GHz frequency for a Fe – Al composite material with the field of rotational magnetic dipoles application.