Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20    No. 6    June 2010

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Preparation of electrolytic copper powders with high current efficiency enhanced by super gravity field and its mechanism
WANG Ming-yong(王明涌)1, 2, WANG Zhi(王 志)1, GUO Zhan-cheng(郭占成)1, 3

1. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Beijing 100190, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China;
3. Laboratory of Ecological and Recycle Metallurgy, University of Science and Technology Beijing,
Beijing 100083, China

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.

 

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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