氩气气压对铝丝电爆炸合成纳米粉体特性的影响  

Effect of Argon Gas Pressure on Nanopowders Synthesized by Electrical Explosion of Aluminum Wire

作　　者：刘隆晨[1] 张乔根[1] 燕文宇[1] 王喆[1] 张璐[1] 铁维昊[1] 

机构地区：[1]西安交通大学电气工程学院,西安710049

出　　处：《高电压技术》2013年第7期1710-1715,共6页High Voltage Engineering

摘　　要：为了研究氩气气压对铝丝电爆炸法合成的铝纳米粉体特性的影响,建立了一台基于金属丝电爆炸的纳米粉体生产和收集装置,在不同氩气气压条件下成功地制备了铝纳米粉体。利用透射电子显微镜(TEM)观察了合成的铝纳米粉体的形态与结构,并通过TEM图像分析得到了铝纳米粉体的粒径大小及其分布。结果表明:当氩气气压较高时,铝纳米粉体颗粒外形规则,呈球形;其平均粒径比低气压时大;当氩气气压<100kPa时,较高的氩气气压可显著地扩宽铝纳米粉体的粒径分布范围。分析发现,采用这种方法制备的铝纳米粉体的颗粒外形、颗粒粒径及其粒径分布均可以通过改变氩气气压来进行控制。We successfully prepared aluminum nanopowders in argon gas of different pressures after establishing an experimental device for producing and collecting the powder via electrical explosion of aluminum wire.Based on these works,the effect of argon gas pressure on the characteristics of the obtained aluminum nanopowders was investigated.The morphology and structure of the aluminum nanopowders was observed by transmission electron microscope（TEM）,and the size and distribution of nanoparticles were obtained by analyzing the TEM images.The results showed that,in argon gas of high pressure,the obtained aluminum nanoparticles were in regular spherical shapes,and had larger count mean diameters than those produced in argon gas of lower pressure.Within 100 kPa,a higher pressure of argon gas could broaden the range of aluminum nanoparticle size distribution evidently.It is concluded that the shape,size,and size distribution of aluminum nanoparticles can all be controlled by the pressure of argon gas.

关 键 词：金属丝电爆炸 氩气气压 铝纳米粉体 颗粒形态 粒径分布 平均粒径 

分 类 号：TB383.1[一般工业技术—材料科学与工程]