【摘要】 通过在纯水中对稀土氧化物进行高能球磨制备出超细纳米悬浮液,考察了球磨时间、转速等制备条件对悬浮液稳定性以及粒子结构的影响.结果表明,球磨时间和转速的增加有利于提高悬浮液的稳定性,粒子尺寸的大小,分布的均匀性以及表面电荷性质是决定悬浮液稳定性的重要因素.利用这种方法制备的悬浮液具有良好的稳定性和较高的浓度,同时不含分散剂和稳定剂,因而具有表面张力高、粘度低等特点.更多还原

【Abstract】 Rare-earth oxides Ln2O3(Ln = La, Ce) ultrafine nano suspensions in pure water were prepared by a high energy ball-milling technique. The effects of ball milling time and rotating speed on the stability of suspensions and particles structure were investigated. Increasing the ball-milling time and rotating speed is in favor of improving the stability of suspensions. The size, distribution and surface charge characteristics of particle in suspensions maybe the important factors for stability of suspensions. These suspensions have excellent stability, high concentration, high surface tension and low viscosity.更多还原