采用催化裂解法制备出炭球,将其分别在2300℃和2800℃进行石墨化处理,用TEM和XRD对微观结构和晶体结构进行了研究.结果表明:未石墨化处理的炭球具有较圆整的球形结构,晶体结构不规整.当氢气流量为3000ml/min和4000ml/min时,获得具有洋葱结构的炭球.球体散布着直径在几个纳米～30nm的铁金属颗粒.经过石墨化处理,炭球的球形结构转变为多面体结构,铁颗粒被除去.2800℃石墨化处理使炭球的石墨层间距降低,石墨化度提高,晶体结构变得非常规整.
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