The effects of strontium ferrite micro-and nanoparticles on the microstructure, phase, magnetic properties, and electromagnetic waves absorption of graphene oxide-SrFe12O19-SiC aerogel nanocomposite

Abstract

In this work, ultralight electromagnetic (EM) wave absorbent based on the graphene oxide (GrO) nanocomposite was investigated. This research aims to fabricate an aerogels nanocomposite made of GrO as an aerogel matrix and the absorbent of the electrical part of EM waves, strontium ferrite nanoparticles as an absorbent of the magnetic portion of EM waves, silicon carbide as a dielectric nanoparticle for further EM waves absorption. To prepare the graphene oxide aerogel - strontium ferrite - nano silicon carbide nanocomposite, the hydrothermal - freeze-drying method was used. The effects of strontium ferrite micro-and nanoparticles on the microstructure, phase, magnetic properties, and electromagnetic waves absorption were investigated. Results show that aerogel with nano-sized particles possesses a better EM absorbing performance than the micro-sized particles due to better impedance matching and nanosize effect.