稻壳在稀盐酸中沸煮、干燥后,于540℃裂解,制得了一种SiO2气凝胶.ICP-AES测定结果表明了该气凝胶中SiO2质量含量为99.99%,激光粒度仪测定其体积平均粒径为20.77μm,BET法研究表明了该气凝胶的比表面积为251m2/g.并利用XRD、IR和SEM研究了稻壳在制备气凝胶过程中的结构变化.
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