Abstract: <FONT face=Verdana>Superfine zirconia powder was prepared using zirconium oxychloride as raw material,urea as precipitator,and different surfactants as dispersants.Experiment showed that based on the same test conditions,crystal form of zirconia was dominated by oblique crystal (monoclinic ZrO2) when adding polyethylene glycol (PEG) or polyvinyl alcohol (PVA) as dispersants;meanwhile,there was also some tetragonal ZrO2;moreover,PEG plays a more effective role than PVA in boosting output of tetragonal ZrO2;in contrast,Span80 will significantly inhibit the tetragonal ZrO2 from growing and the product was purer.In addition,introducing different dispersants would lead to varied particle shapes.Zirconia with spindle shape will be obtained when adding PEG as dispersant,and ellipsoidal zirconia will be prepared when adding PVA or Span80.</FONT>