摘要：以硝酸铝为原料 ,探讨了具有三维结构耐温表面活性剂对水相沉淀法合成球形Al₂O₃ 纳米粉的颗粒分散性能 ,研究了该活性剂不同G值和用量对粉体粒径及分布的影响 ,并讨论了该表面活性剂的作用机理

关键词：氧化铝;纳米粉体;表面活性剂;分散;

Abstract：By using a three dimensional surfactant，dendrimer，as modifier，in the synthesis of alumina from Al（NO₃）₃ aqueous solution，spherical Al₂O₃ nanometer powder with mono－dispersion is obtained．The deffect of the G value and the amount of the surfactant on the particle size and distribution are investigated．A possible modification mechanism is proposed 

Key words：alumina；nanometer powder；surfactant；dispersion