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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (1): 81-85. 上一篇    

研究简报

置换法制备核壳结构Cu/Al复合粉末

程志鹏, 杨毅, 刘小娣, 杨永林, 李凤生*   

  1. (南京理工大学国家特种超细粉体工程技术研究中心 南京 210094)
  • 投稿日期:2006-06-23 修回日期:2006-07-28 发布日期:2007-01-14
  • 通讯作者: 李凤生

Preparation of Core-shell Cu/Al Powders by Displacement Method

CHENG Zhi-Peng; YANG Yi; LIU Xiao-Di; YANG Yong-Lin; LI Feng-Sheng*   

  1. (National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology, Nanjing 210094)
  • Received:2006-06-23 Revised:2006-07-28 Published:2007-01-14
  • Contact: LI Feng-Sheng

PDF

1799

被引次数

31 | 8

在以明胶为保护剂、氟离子为络合剂的水溶液中, 采用Al粉直接置换还原铜盐的方法, 实现了纳米Cu在Al粉表面的快速化学沉积, 制备出核壳结构的Cu/Al复合粉末. 提出了置换反应的机理和历程, 探讨了反应的影响因素. 利用SEM, XRD, EDS, BET等测试手段对复合粉末进行了微观测试和表征. 结果表明: Al粉表面连续、均匀包覆了由晶粒大小约20 nm的Cu纳米颗粒组成的壳层.

关键词: 纳米粒子, 铝粉, 铜粉, 核壳结构, 制备

A kind of novel core-shell Cu/Al powders has been prepared by displacement method, in which nano-sized Cu was made to cover the surface of micron-sized aluminum powders. This reaction happened under the existence of coordination agent—fluoride and protective agent—gelatin. The preparation method and reaction mechanism have been discussed. The microstructure and morphology of the Cu/Al powders were investigated by SEM, XRD, EDS and BET. The analysis results show that this method can prepare the compact shell for Cu/Al powders. The Cu particle coated on aluminum particle was uniform and continuous. The average diameter of Cu crystallites was about 20 nm.

Key words: nanoparticle, aluminum powder, copper, core-shell structure, preparation