关键词: 鳞片石墨;微波辐射;膨胀石墨;高铁酸钾

Abstract: The expanded graphite could be prepared rapidly by making the sulfuric acid molecule into the graphite layer with natural flake graphite as raw material, concentrated sulfuric acid and potassium ferrate as intercalation agent and oxidizing agent.The results show that the expansion property of the prepared expandable graphite under microwave irradiation is better than that of the conventional heating method, and the biggest volume expansion was 140 mL·g-1 when the mass ration is graphite,K2FeO4 and the volume of sulfuric acid consumption 1∶0.25∶20,the response time of 30 min,the microwave radiation time of 20 s;the Infrared spectra and XRD and SEM characterization were carried out.Then found that the ferrate weaken the graphite layer force effectively make the sulfate molecule into the interlayer ,but the graphite can not be oxidized significantly, and the prepared expanded graphite has obvious "worm" like structure, and the layer is opened to form a rich network structure, and the surface structure and the material are basically consistent.

Key words: flake graphite;microwave radiation;expanded graphite;potassium ferrate