采用沉淀法制备超细氧化铝粉 ,通过添加表面活性剂控制颗粒的大小、共沸蒸馏处理有效地消除氢氧化铝凝胶的硬团聚 ,制得了平均粒度为d50 =0 47μm、比表面积BET =4 5 5 6 0m2 /g的超细粉末 The superfine alumina powder was prepared by the precipitation method. The size of the particles was controlled by adding the surfactant, and the azeotropic distillation effectively eliminated the hard agglomeration of the aluminum hydroxide gel. The average particle size was d50 = 0 47μm, the specific surface area BET = 4 5 5 6 0m2 / g of ultra-fine powder