不同冷凝条件下电弧气化法制备纳米锡粉  

Preparation of Nano-Sn Powder by Arc Gasification Method under Different Condensation Conditions

作　　者：张瑾[1] 竺培显[1] 周生刚[1] 孙丽达[1] 黄文芳[1] 杨秀琴[1] 许健[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《材料科学与工程学报》2010年第3期421-424,共4页Journal of Materials Science and Engineering

摘　　要：采用直流电弧法在不同冷却介质中分别制备了纳米Sn粉末,利用X射线衍射(XRD),透射电镜(TEM)测试手段对样品的物相、形貌、粒度等进行表征。发现在液体松油醇冷却条件下制备出的粉末粒径较小,粒径均匀,平均约为60nm,形貌为球形,且纯度较高;而在Ar气的冷却条件下制备的粉末粒径较大,平均约为65nm,有少量氧化。通过对粉末的形核长大机理进行分析讨论,认为温度梯度、饱和度是形核长大的重要影响因素。在相同的制粉条件下,以松油醇为冷却介质能产生较大的温度梯度,有助于获得较高的形核率,抑制粉末的长大,可制得较细的纳米Sn粉末。Nano-Sn powder was prepared by DC arc discharge method with different cooling media.X-ray diffractometry（XRD）,transmission electron microscopy（TEM）were used to characterize the crystal structure,morphology,and particle size.It was found that the powder prepared in terpineol has an average particle size of about 60nm with spherical morphology,uniform particle size distribution and high purity.But the powder prepared under Ar gas has an average particle size of about 70nm with a small amount of oxide.The nucleation and growth mechanism for nano-Sn particles under both cooling conditions are discussed.The temperature gradient and saturation are important factors for nucleation and growth of particles.The larger temperature gradient in terpineol is conducive to obtaining smaller nano-Sn powder.

关 键 词：纳米Sn粉 电弧气化法 冷却介质 

分 类 号：TB383[一般工业技术—材料科学与工程]