用硬脂酸溶胶凝胶-共沸蒸馏法制备了纳米LaCoO3,用差热-热重、 透射电镜及红外等手段对粉体进行了表征,并对配合物溶胶-共沸蒸馏脱水的干燥机制进行了探讨.实验结果表明:硬脂酸溶胶凝胶法制备纳米粉体时,配合物溶胶的干燥脱水是不可缺少的一步.共沸蒸馏所用的溶剂苯是通过物理吸附作用替代了配合物溶胶中的水,其机理是靠降低粒子间毛细管力来减少聚集作用的,从而防止了干燥及后续煅烧阶段的粉体团聚.
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