Abstract：The morphology and particle size of spherical solder powder have an important influence on solder paste products. The atomization atmosphere of spherical solder powder was experimentally studied. The morphology and particle size distribution of atomized solder powder in the atmosphere of air， helium， nitrogen， argon， nitrogen and helium mixed and nitrogen and argon mixed were compared. The results show that the oxygen content in the atomization atmosphere is the key factor affecting the sphericity， average particle size and particle size distribution of the powder. A comprehensive comparison shows that nitrogen is more suitable for centrifugal atomization production of spherical solder powder.
2018, Vol. 28 
