球磨工艺参数对醇水系纳米CeO_2悬浮液稳定性的影响

Effect of process parameters of ball mill on stability of nanometer CeO_2 suspension in dispersion medium of water and alcohol

使用行星式球磨机分散醇水系纳米CeO2悬浮液,引入沉淀率及其变化量评价其分散稳定性,讨论了球磨时间、球料比、球磨机转速和纳米CeO2质量分数对分散稳定性的影响。通过破碎力打开团聚体的形式来分析球磨时间的影响,从颗粒受作用次数方面来讨论球料比的影响,球磨机转速是划分研磨力和冲击力的主次地位的重要参数;理论CeO2质量分数和球料比的选择要综合考虑分散稳定性和球磨机的能量利用率。

In this work, the planetary mill was used to disperse nanometer CeO2 particles in the dispersion medium of water and alcohol. Precipitation rate （PR） and its varied quantity （PRVQ） were introduced to evaluate the stability of CeO2 suspension. Effect of ball milling time （BMT）, ball to powder ratio （BPR）, milling speed （MS） and theoretic mass fraction （TMF） of CeO2 particles on stability of CeO2 suspension was discussed. In terms of the crushing force opening the agglomerates, the effect of BMT was discussed. And in the respective of crushing frequency of particles, the effect of BPR was evaluated. MS was the significant factor of the division of the milling force and the impact force. The selections of TMF and BPR need to give consideration to dispersion stabilization, energy efficiency and PR in a comprehensive way.