纳米铝粉在煤油中的均分散技术  

Study on dispersion of nano-aluminum powder in kerosene

作　　者：刘香翠[1] 朱慧[1] 张炜[1] 王春华[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《推进技术》2005年第2期184-187,共4页Journal of Propulsion Technology

摘　　要：研究了纳米铝粉在煤油中的均分散技术.研究发现,在煤油中加入适量的凝胶剂,并采用电磁搅拌或超声波进行分散,可使纳米铝粉在煤油中不沉降,达到分散均匀并能稳定贮存.研究结果表明,纳米铝粉/煤油凝胶体系中纳米铝粉的含量增加,不使铝粉沉降所需加入的凝胶剂量减少;当纳米铝粉含量达到一定值时,不加凝胶剂即可使纳米铝粉在煤油中不沉降,说明此时纳米铝粉本身就相当于一种凝胶剂;而普通铝粉不存在这种特性.对于纳米铝粉在煤油中的分散而言,超声波分散的效果好于电磁搅拌的分散效果.超声波作用时间8～10min是使纳米铝粉在煤油中达到均分散的最佳时间.The dispersion techniques of nano-aluminum powder in kerosene are studied in detail. The addition of the gellant makes nano-aluminum disperse in kerosene to form nano-aluminum-kerosene gel system by means of electromagnetic stir and ultrasonic. With increase of the content of nano-aluminum powder, the content of gellant to form nano-aluminum-kerosene gel system decreases. When the content of nano-aluminum powder is over 6 percent, no gellant is needed to form the nano-aluminum-kerosene gel system, which indicates that nano-aluminum powder itself acts as a gellant. However, the normal aluminum powder cannot act as gellant. On the other hand, the ultrasonic dispersion effect of nano-aluminum in kerosene is better than that of electromagnetic stir. The experimental results showed that the optimum dispersion time to form nano-aluminum-kerosene gel system is 8-10 min by means of ultrasonic power.

关 键 词：纳米铝粉 煤油 分散 凝胶剂 

分 类 号：V511[航空宇航科学与技术—航空宇航推进理论与工程]