摘要：以尿素为沉淀剂, Y (NO₃) ₃为钇源, 选用不同表面活性剂, 采用均相沉淀法成功制备不同粒径的球形纳米氧化钇粉体 (Y₂O₃) ;研究反应时间、反应温度、反应物浓度、表面活性剂类型及用量对Y₂O₃形貌及粒径的影响;通过激光粒度Zeta电位仪、SEM对样品进行表征。结果表明, 反应时间、反应物浓度、表面活性剂、反应温度会影响粉体的分散性及粒径大小;CTAB与PEG-4000复合使用, 可显著减小Y₂O₃的粒径, 提高粉体分散性, 得到的氧化钇粒径大小约为50 nm。

关键词：均相沉淀法；球形纳米氧化钇；尿素；表面活性剂

Abstract：The different particle size of nano-sized Y₂O₃ spherical powders were successfully prepared by homogeneous precipitation method, with different surfactants, urea as the precipitating agent and Y (NO₃) ₃ as the yttrium source. The factors such as the reaction time, reaction temperature, reactants concentration, surfactant type and dosage on the morphology and particle size of Y₂O₃ powders were studied. The samples were characterized by laser particle size analyzer and scanning electron microscopy (SEM) .The results show that the reaction time, reactants concentration, surfactants, reaction temperature affect the dispersant and particle size of the powders, the mixed using of CTAB and PEG-4000 reduce the particle size of Y₂O₃ significantly and improve dispersion of particles, and the particle size of Y₂O₃ powders is about 50 nm.

Keywords: homogeneous precipitation method；nano-sized Y2O3 powder；urea；surfactants