Fe2alb2@Feal-Ldhs Core-Shell Heterostructures for Electromagnetic Wave Absorption

Abstract

The rapid development of high-performance materials has garnered considerable attention in addressing electromagnetic pollution. The structural design of core-shell heterostructures is an effective approach for regulating the electromagnetic parameters of the absorbers. However, the adhesive shell phase and core phase usually lacks a direct channel for charge transport. Herein, Fe2AlB2@FeAl-LDHs core-shell heterostructures were prepared by a top-down approach. The FeAl-LDHs nanosheets tightly connected to the Fe2AlB2 parent phase improved the poor electronic transport. Compared to raw Fe2AlB2, the spherical absorber with an embroidered structure demonstrated stronger reflection loss and a broader effective absorption bandwidth for the electromagnetic wave (2-18 GHz) due to the enhanced dielectric and magnetic losses. This study presents a practical method for designing new controllable core-shell heterostructures for electromagnetic wave-absorbing materials.

Keywords: Key wards: MAB phase, Fe2AlB2, layered double hydroxides, electromagnetic wave absorption, core-shell heterostructure