Carbon-coated Co, Ni nanoparticles present more excellent electromagnetic wave absorptive properties. The reflection loss R (dB) of Ni(C) composite materials can reach to 10 dB from7-10 GHz with 2 mm thickness.

• Ni(C)复合纳米粒子吸波效果优异很多,吸收峰在8 GHz频段上出现,在7-10GHz吸收值高于10 dB。