摘要：选择了聚丙烯酸（PAA）、单宁酸、六偏磷酸钠（NaPO3）6作α－Al2O3料浆的分散助剂，系统地研究了α－Al2O3料浆分散性能。研究表明：α－Al2O3料浆分散性能受分散剂的浓度、料浆的ｐＨ值及粉料的粒度分布的影响，找出了α－Al2O3适宜的分散剂及其使用条件。
关键词：聚分子电解质;湿法分级;超细粉;α-Al2O3;
Abstract：The dispersing performance of ultrafine α-Al2O3 suspensions w ith addition of the polyacrylic acid（ PAA） ，tannic acid and calgon is studied．T he results show that it is strongly influenced by the concentration of dispersing medium，pH value and pow der size distribution．The appropriate medium and its using condition are discovered．
Key words：polyelectrolyte；wet classification；ultafine powder；α-Al2O3
