自悬浮定向流技术中铜纳米微粒的粒度控制研究
Preparation and granularity control of nanosized copper particles by flowlevitation method
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摘要: 采用自悬浮定向流技术制备了金属铜纳米微粒，根据TEM的行貌像对样品平均粒度进行标定，并结合样品制备的条件对制备工艺进行了研究。结果表明，自悬浮定向流技术可以方便地制备出不同粒度的金属铜纳米微粒，微粒平均粒径随熔球温度的降低而减小，随冷却气体流速的增大而减小；在1 200℃下微粒平均粒径随惰性气体压强的增大而减小，而在1 300℃时惰性气体压强对微粒平均粒径的影响不再具有规律性。Abstract: Nanosized copper particles were prepared by flowlevitation method. The analyses based on transmission electron microscope (TEM) have been carried out in order to evaluate the average particle size of particles. The relationship between the average particle size and inert gases speed in different temperature and pressure has been established. Combining these characteristic curves, the manufacturing parameter can be obtained. The results shows that the particle size of nanosized copper gradually decreases by reduce the temperature of metal fused drop or increase gases speed. Moreover, to increase the inert gases pressure will deerease the average particle size at 1 200℃.
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