纳米CeO_2在水相介质中的分散性能研究  

Dispersion of CeO_2 Nano-powders in Water Suspension

作　　者：周亮[1] 左敦稳[1] 康静[1] 李茂[1] 朱永伟[1] 孙玉利[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机械制造与自动化》2009年第1期21-23,共3页Machine Building & Automation

基　　金：国家自然科学基金(批准号:50675104);江苏省精密与微细制造技术重点实验室开放基金(JSPM200707)资助

摘　　要：通过对纳米CeO2悬浮液体系中颗粒的表面电性进行测定,采用无机电解质类分散剂(SHP)和非离子型表面活性剂聚乙烯吡咯烷酮(PVP)对纳米CeO2粉体进行了分散实验,研究了超声分散时间及表面活性剂浓度对纳米CeO2粉体在水相介质中分散性能的影响。结果表明,随超声时间的增加,纳米CeO2粉体的分散性增强;随分散剂浓度的增加,纳米CeO2粉体的分散性呈先增后减的变化规律。纳米CeO2粉体在水相介质中的分散工艺为:超声时间20m in,浓度为2.0%的SHP。Based on measurement of surface potential of CeO2 nano-powders, the influence of supersonic time and surfactant concentration on the stability of CeO2 suspension is studied by using such surfactants as sodium hexametaphosphate （SHP） and polyvinylpyrrolidone （PVP）. The results show that the dispersion of CeO2 water suspension is increased to a maximum and then kept steady with the increase of ultrasonic time. But, with the increase of surfactant concentration, the dispersion of CeO2 water suspension is increased to a maximum and then decreased. SliP is a better dispersant agent between the two kinds of surfactant used in the experiments. The optimized dispersing condition is 2.0wt% of SHP and ultrasonic time of 20 min.

关 键 词：纳米 纳米CeO2粉体 分散性能 水相介质 分散工艺 

分 类 号：TG14[一般工业技术—材料科学与工程]