Preparation Of Microwave Absorbing Ceramic Material By Electroless Ni-Co Plating

Electroless plating of nickel-cobalt on the ceramic powder surface was performed using hydrazine as reducing agent. The material was characterized by microwave electromagnetic parameters, SEM, X-ray Diffraction, energy dispersive X-ray spectroscopy, vibrating sample magnetometer and microwave network analyzer. The results indicated that the content of spherical metal particles on the ceramic powders was 68%, the ratio of nickel to cobalt was 9:1. The magnetization, the coercivity and the retentivity were 17.7 emu center dot g(-1), 210.9 Oe and 2.4 emu center dot g(-1) respectively. The microwave absorptivity of the powders exceeded 10 dB in the range of 10.2 similar to 11.5 GHz.