Achieving enhanced dielectric property via growing Co-Ni-P nano-alloys on SiC nanowires with 3D conductive network

Abstract

Magnetic Co-Ni-P nano-alloys were successfully prepared as microwave absorbers. Unfortunately, the poor dielectric properties severely restricted their microwave absorption performance. With the goal of high microwave absorption efficiency, one dimensional (1D) Co-Ni-P/SiC nanowire composites were firstly fabricated by means of an easy electroless plating method. A three dimensional (3D) conductive network can be constructed by the 1D composites. Results demonstrated that the 3D conductive network has significant effects on improving the dielectric loss of absorbers. The minimum reflection loss of the optimized composites can reach −45 dB at 12.5 GHz with a thickness of only 1.5 mm owning to their suitable impedance matching and multiple loss mechanisms. This work proposed a facile route to prepare 1D magnetic absorbers with higher absorption efficiency and their electromagnetic property and microwave absorption were also studied in detail.