摘要：以SiO₂为原料,探讨了超声波机械法制备纳米粉体粒子的实验情况,考察了搅拌棒齿间距、作用时间、原料浓度、分散剂浓度、转速等因素对超声波机械法制备纳米粉体的影响,探索了实验过程中纳米SiO₂粒子的粉碎平衡。实验结果表明,超声波与机械搅拌技术的协同作用制备的纳米粒子,粒度更小、分散稳定性更好。两轮正交实验结果分析得出了显著性因素,影响因子以作用时间为最大,搅拌棒齿间距次之。

关键词：超声波；纳米粒子；机械法；空化作用

Abstract：The preparation of nanoparticles by ultrasound-mechanical method were studied, which the raw material was SiO₂. The effects of the stirred rod's tooth space, reaction time, and concentration of raw material, dispersant concentration and the velocity of stirred rod on the preparation of nanoparticles by ultrasound-mechanical method were investigated. Pulverizing equilibrium of SiO₂ nanoparticles was explored during the experiments. The results show that the grain size is smaller and the stability of SiO₂ nanoparticles is better by mechanical method with ultrasound. The eminent factors are obtained through two rounds orthogonal experiment result and analysis. With reaction time being the main factor, the stirred rod's tooth space decrease successively.

Keywords：ultrasound;nanoparticles;mechanical process;cavitation