铜基碳纳米管复合电镀辅助工艺的对比研究

铜基碳纳米管复合电镀是制备场发射阴极的极佳工艺。基于铜基碳纳米管的复合电镀技术,对比研究了不同辅助工艺对复合镀层质量的影响,包括机械搅拌、空气搅拌、阴极移动、超声波振荡、间歇超声波振荡。使用机械类辅助工艺,镀液振动较小,镀层上的碳纳米管较多,但团聚的也多;使用超声波类辅助工艺,镀液振动较大,镀层上的碳纳米管较少,基本无团聚现象。两大类辅助工艺应联合使用,控制合适的间歇振荡时间是获得碳纳米管数量多、分散性高的复合镀层的关键。

A Comparative Research on Auxiliary Processes for Copper Based Carbon Nanotube Composite Electroplating

Composite electroplating of carbon nanotubes and copper is an excellent process for preparing field emission cathode.Based on copper based carbon nanotube composite electroplating technology,the effects of different auxiliary electroplating processes(including mechanical agitation,air agitation,cathode movement,ultrasonic oscillation,intermittent ultrasonic oscillation) on the quality of the composite coating were compared and investigated.When mechanical auxiliary processes were used,the bath vibration was small,leading to more carbon nanotubes on the coating,but also with many agglomerations;when ultrasonic auxiliary processes were used,the bath vibration was bigger,resulting in less carbon nanotubes on the coating,almost with no agglomeration.The two kinds of auxiliary processes should be used in combination to control a more appropriate time of intermittent oscillation,which is the key for obtaining a composite coating with more highly dispersed carbon nanotubes.