Synthesis and microwave absorption properties of AgVO₃/Ag₂CrO₄ heterostructure in the K-band

A heterostructure based on AgVO₃ and Ag₂CrO₄ was synthetized combining of the coprecipitation method, and the microwave-assisted hydrothermal (MAH) method. The synthetized samples were dispersed in an epoxy matrix to obtain a composite with 50 wt.% additive and 50 wt.% epoxy. To investigate the formation of the desired materials, the structural characterizations performed were the X-ray diffraction technique, applied to confirm the phase formation of each material, and the Raman spectroscopy, to investigate the appearance of the interface between the materials of the heterostructure. The rectangular waveguide based on Nicholson-Ross-Weir model was used to measure the electromagnetic properties, samples of each material that compose the heterostructure were prepared to investigate the influence of the creation of the interface between these materials. Based on the electromagnetic properties measured, complex electric permittivity and complex magnetic permeability, electromagnetic simulations of the reflection loss method were performed in the FEKO software, to explore the potential of these materials as radar absorbing materials (RAM), and in order to verify the integrity of the simulations a comparison of a measured reflection loss and a simulated one, with the same conditions, was performed.