| 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。 |
| 关键词: 纳米铝粉 煤油 分散 凝胶剂 |
| DOI： |
| 分类号:V511 |
| 基金项目: |
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| Study on dispersion of nano-aluminum powder in kerosene |
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LIU Xiang-cui, LIU Xiang-cui, ZHU Hui, WANG Chun-hua
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Inst. of Aerospace and Material Engineering, National Univ. of Defence Technology, Changsha 410073, China
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| Abstract: |
| In this paper, 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 8～10min by means of ultrasonic power. |
| Key words: Nano-aluminum Kerosene Dispersion Gellant |
