摘要
采用对电解液进行超声分散的新型电沉积法,制备超细铜粉,借助X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)和激光粒度分析(SL)对所得粉末进行表征,研究电解液中Cu2+浓度对粉末形貌、粉末粒径以及电流效率的影响,深入探讨粉末的形成机理。结果表明:所生成的粉末为fcc结构的单质铜;取决于乳化液中表面活性剂的分布,粉末具有鱼骨状和不规则状两种形貌;随着电解液浓度从0.03 mol/L增加到0.09 mol/L,铜粉的平均粒径从0.92μm线性增加到1.8μm,电流效率从65.5%线性提高到91.3%。
The auto-evolved ultrafine copper powders were successfully synthesized via a novel electrodeposition route performed by ultrasonically dispersing the electrolyte. The properties of the samples obtained were characterized by means of X-ray powder diffraction （XRD）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM） and laser size distribution analyzer （SL）. On this basis, the influences of Cu^2＋ concentration on particle morphology, particle size and current efficiency were investigated, as well as the formation mechanisms of the powders were discussed in detail. The results show that the as-prepared powders are high-pure copper with thefcc structure, and the sample is a mixture of fishhone-like and irregular nanoparticles; with increase of the concentration of Cu^2＋ from 0.03mol/L to 0.09mol/L, the average size of copper particles increases from 0.92μm to 1.8μm and the current efficiency of electrodeposition linearly rises from 66.5% to 91.3%.
出处
《粉末冶金材料科学与工程》
EI
2009年第3期169-173,共5页
Materials Science and Engineering of Powder Metallurgy
基金
湖南省自然科学基金资助项目(08JJ3104)
关键词
铜粉
电沉积
超声
copper powder
electrodepositon
ultrasound
