Effects Of Process Parameters On Cu Powder Synthesis Yield And Particle Size In A Wet-Chemical Process

Archives of Metallurgy and Materials

J.-H. Lee¹  Y.M. Shin³ 

[1]ENGINEERING, SEOUL NATIONAL UNIVERSITY OF SCIENCE &

[2]TECHNOLOGY, SEOUL 139-743, REPUBLIC OF KOREA

[3]DEPARTMENT OF MATERIALS SCIENCE &

关键词: Keywords: Wet-chemical process;    Micron-size Cu powder;    Synthesis yield;    Particle size;    Gibbs free energy difference;   

DOI  :  10.1515/amm-2015-0107

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

This study presents a simple wet-chemical process to prepare several micron-size Cu powders. Moreover, changes in powder synthesis yield and particle size are examined with different solvents, synthesis temperatures, and amounts of reducing agent during the synthesis. As a reducing agent and capping agent, L-ascorbic acid and polyvinyl pyrrolidone were used, respectively. The yields in distilled water or an ethylene glycol (EG)/distilled water mixture were higher than that in EG alone, and the yield increased with increasing temperature owing to a lower Δ Gred value. Increasing the L-ascorbic acid concentration also increased the yield. The Cu powder synthesized in 3 h at 90°C in distilled water with 272.8 mM of L-ascorbic acid showed the lowest average particle size of 2.52 μm, indicating mechanisms of short burst nucleation and reduced growth via the increased reduction rate of Cu ions. It is estimated that the nucleation step was nearly completed within 10 min in this system. The Cu powders synthesized in an ethylene glycol/distilled water mixture presented an average particle size of 3.76 μm and the highest yield of 87.9%.

【 授权许可】

Unknown