Abstract: Silver nano-particles were prepared by direct current arc plasma evaporation method. The structure of silver nano-particles was analyzed by XRD. The effects of ultrasonic dispersion process and different dispersants including polyvinylpyrrolidone， cetyltrimethyl ammonium bromide and sodium dodecyl sulfate for dispersing performance of silver nano-particles aqueous suspensions were studied by laser nano-particle size instrument. The best dispersing process and laser particle size distribution were obtained. The difference of silver nano-particles between laser particle size and TEM statistics particle size was comparatively studied. The results show that the silver nano-particles belong to polycrystalline cubic crystal system with good crystalline. The best dispersant is cetyltrimethyl ammonium bromide and the best ultrasonic power is 600 W. The dispersion stability of the sample is fine when the mass concentration of cetyltrimethyl ammonium bromide is 0.5 g/L. The laser particle size is a dynamic secondary particle size， which is little larger than the TEM statistics particle size.

Keywords: silver nano-particles; dispersant; dispersion stability; particle size

中图分类号：TG146.3⁺2        文献标志码：A

文章编号：1008-5548（2014）03-0044-05

DOI:10.13732/j.issn.1008-5548.2014.03.010

收稿日期：2013-09-05， 修回日期：2013-09-17，在线出版时间：2014-06-24。

基金项目：广西科学研究与技术开发计划（科技攻关与新产品试制）项目，编号：桂科攻 11107003-8；广西科学研究与技术开发计划（科技成果转化与推广计划）项目，编号：桂科转 1298009-15；广西科学研究与技术开发计划（科技创新能力与条件建设计划）项目，编号：桂科能1270010。

第一作者简介：秦海青(1979—)，男，硕士，高级工程师，研究方向为纳米金属粉体的制备及应用。电话：0773-5636385，E-mail：qinhaiqing5218@163.com。