Sodium citrate-induced generation of multi-interfacial embroidered spherical SnO₂for augmented electromagnetic wave absorption

Abstract

In this paper, sodium citrate was selected as a shape inducer to construct a multi-interface embroidered spherical structure. The RLmin value is −45.6 dB and the EAB at 2.6 mm is 6.08 GHz, owing to the mutual balance of impedance and attenuation.

Review of Dielectric Carbide, Oxide, and Sulfide Nanostructures for Electromagnetic Wave Absorption

“…Magnetic-loss-type nanomaterials like ferrite and cobalt–nickel alloys rely on natural resonance and eddy current losses to convert electromagnetic energy into thermal energy. − These materials have high magnetic permeability, but they are easily reflected and susceptible to oxidation. − When compared with the first two materials, dielectric-type nanomaterials have attracted widespread research due to their excellent stability and controllable morphology, as well as their ability to optimize impedance matching. − For the same material, the morphology is different, and the electromagnetic wave absorption properties are not quite the same. Taking tin dioxide as an example, in the work of Lu et al tin dioxide nanoparticles with different morphologies were prepared by the hydrothermal-calcination method. The initially formed solid spherical SnO 2 does not have a wave absorption property, and the spiny spherical SnO 2 initially can absorb electromagnetic waves, with a minimum reflection loss of −39.94 dB and an effective absorption bandwidth of 5.28 GHz.…”