Preparation of electrolytic copper powders with high current efficiency enhanced by super gravity field and its mechanism

来源期刊：中国有色金属学报(英文版)2010年第6期

论文作者：王明涌 王志 郭占成

文章页码：1154 - 1160

Key words：super gravity field; current efficiency; copper powders; electrolysis

Abstract: Super gravity field was employed to enhance electrolytic reaction for the preparation of copper powders. The morphology, microstructure and size of copper powders were characterized by scanning electron microscopy, X-ray diffractometry and laser particle analysis. The results indicated that current efficiencies of electrolytic copper powders under super gravity field increased by more than 20% compared with that under normal gravity condition. Cell voltage under super gravity field was also much lower. The size of copper powders decreased with the increase of gravity coefficient (G). The increase of current efficiency can be contributed to the disturbance of electrode/electrolyte interface and enhanced mass transfer of Cu²⁺ in super gravity field. Meanwhile, the huge gravity acceleration would promote the detachment of copper powders from electrode surface during electrolytic process, which can prevent the growth of copper powders.

基金信息：the National Natural Science Foundation of China
the Knowledge Innovation Program of Chinese Academy of Sciences