Synthesis and characterisation of calcium–iron–aluminium nanocomposites for electromagnetic radiation shielding application.

This article focuses on the synthesis and characterization of calcium–iron–aluminium (Ca:Fe:Al) nanocomposites prepared via a solution combustion method for electromagnetic interference (EMI) shielding applications. Various doping concentrations of aluminium nanoparticles were incorporated into CaFe nanocomposites, and their structural, surface, and electromagnetic shielding properties were analyzed using techniques such as powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), UV–Visible spectroscopy, and Fourier-transform infrared (FTIR) spectroscopy. The study found that the CaFeAl nanocomposites exhibit crystalline spinel structures with successful aluminium doping and that the CaFeAl-4 composition demonstrated the highest total shielding effectiveness across a broad frequency range, attributed to its enhanced conductivity and attenuation properties. These findings suggest that CaFeAl nanocomposites are promising, cost-effective materials for EMI shielding in various technological applications.