Controllable Fabrication of SiC@C-Fe(3)O(4) Hybrids and Their Excellent Electromagnetic Absorption Properties

In this work, a batch of novel ternary hybrids (SiC@C-Fe(3)O(4)), characterized by SiC nanowires core, carbon shell, and adhered Fe(3)O(4) nanoparticles were controllably synthesized via surface carbonization of SiC(nw) followed by hydrothermal reaction. Carbon, which was derived from SiC with nanometer thickness, possesses an amorphous structure, while Fe(3)O(4) nanoparticles are in a crystalline state. Simultaneously, the inducement of Fe(3)O(4) nanoparticles can provide significant magnetic loss, which is well-tuned by changing the molar content of iron precursors (FeCl(3)·6H(2)O and FeCl(2)·4H(2)O). SiC@C-Fe(3)O(4) hybrids show great electromagnetic absorption performance owing to the synergy effect of dielectric and magnetic losses. The minimum refection loss can reach to −63.71 dB at 11.20 GHz with a thickness of 3.10 mm, while the broad effective absorption bandwidth (EAB) can reach to 7.48 GHz in range of 10.52–18.00 GHz with a thickness of 2.63 mm. Moreover, the EAB can also cover the whole X band and Ku band. The outstanding performance of the obtained material implys that it is a promising candidate as an electromagnetic absorber.