文章利用共沉淀法研究了氢氧化铝镁锂正电溶胶的制备规律 ,分析了LiCl加入量和体系 pH值对正电溶胶的影响 ,并采用透射电镜 (TEM)初步研究了溶胶的结构形貌 The coprecipitation method was used to study the preparation of Mg-Mg-Mg-Li-NPs. The effects of LiCl addition amount and system pH value on the positropolysis were investigated. The morphologies of the sols were characterized by transmission electron microscopy (TEM)