The expansible graphite with high expanded volume was prepared in mixed acids solution with potassium permanganate as oxidizing agent and ferric trichloride as inserting agent.

• 研究了一种以天然石墨和硫酸、硝酸的混酸为原料,高锰酸钾为氧化剂,三氯化铁为插入剂制备高膨胀容积可膨胀石墨的新方法。