自悬浮定向流法制备纳米Fe微粒的粒度控制  

Granularity Control in Preparation Process of Nanosized Fe Particles by Flow-Levitation Method

作　　者：段涛[1,2] 吴栋[1] 唐永建[2] 

机构地区：[1]西南科技大学极端条件物质特性实验室,四川绵阳621010 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《原子能科学技术》2009年第7期636-639,共4页Atomic Energy Science and Technology

基　　金：中国工程物理研究院基金资助项目(20060860);国防重点实验室基金资助项目(9140C6805020607)

摘　　要：采用自悬浮定向流技术制备了金属Fe纳米微粒,对样品平均粒度进行TEM等测试分析,研究了主要制备工艺条件对微粒粒径的影响。结果表明,自悬浮定向流技术可用以制备出不同粒度的金属Fe纳米微粒,其平均粒径随熔球温度的降低和冷却气体流速的增大而减小;在1 500℃左右时,微粒平均粒径随冷却惰性气体Ar压强的增大而减小,而在1 600℃时,气体压强对微粒平均粒径的影响不再具有规律性。Nanosized Fe particles were prepared by flow-levitation method （FLM）, and synthesis condition＇s effect on Fe nanopowder were investigated based on transmission electron micro-scope （TEM）. The results show that FLM can be used to prepare nanosized Fe particles with different diameters, and the particle size of nanosized Fe gradually decreases by reduce the temperature of metal fused drop or increase gases speed. Moreover, increasing the inert gases pressure will decrease the average particle size at 1 500℃. However, the change rules of gas pressure＇s influence on average diameters of Fe particles will be inexistent at 1 600 ℃.

关 键 词：纳米Fe粉 自悬浮定向流法 粒度控制 ICF靶材料 

分 类 号：TB383[一般工业技术—材料科学与工程]