以柠檬酸为造孔剂,利用硅酸乙酯溶胶-凝胶和碳热还原法制备出了高比表面积的纳米碳化硅(SiC)粉体.用TG、XRD、SEM以及BET分析方法对产品进行了表征,结果表明,添加了柠檬酸得到的SiC粉体比表面积可达到13～62 m2·g-1,其大小可由柠檬酸与硅酸乙酯的物质的量比x(x=0～1)来控制;柠檬酸受热分解后留下的孔隙是制备高比表面积SiC的关键所在,当x为0.8,凝胶经1500℃碳热还原反应2h后,得到的产品比表面积高,粒径为100nm.
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