▎ 摘　　要

We have fabricated a novel carbon coating RGO/CNTs lightweight composites using coal tar pitch and frozen petroleum pitch as the carbon resources, respectively. This is done through a high-energy ball milling method and a liquid phase method, respectively. The microwave absorbing properties reveal that the carbon coating RGO/CNTs composite synthesized by liquid phase using coal tar pitch as carbon resource show the maximum absorption of -18.9 dB at 11.7 GHz with a thickness of 2 mm. In addition, the bandwidth corresponding to reflection loss at -10 dB can reach 14.8 GHz (from 3.2 to 18 GHz) with the thickness in the range of 2-7 mm. It is believed that such composite will find its wide applications in microwave absorbing area.