应用化学 ›› 1991, Vol. 0 ›› Issue (4): 90-92.

• 研究简报 • 上一篇    下一篇

锂在铝合金电极上的析出电位和扩散系数

常开国, 赵敏寿   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1990-07-09 修回日期:1990-11-12 出版日期:1991-08-10 发布日期:1991-08-10

DEPOSITION POTENTIALS OF LI(Ⅰ)ON Al-Cu AND Al-RE ELECTRODES AND DIFFUSION COEFFICIENT OF LITHIUM IN LIQUID Al-Cu ALLOY

Chang Kaiguo, Zhao Minshou   

  1. Changchun institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1990-07-09 Revised:1990-11-12 Published:1991-08-10 Online:1991-08-10

摘要: 铝锂合金是一种新型的航空材料,近十年来获得了迅速的发展[1]。1985年发展了熔盐电解法制备铝锂合金新工艺。该法与其他物理冶金法相比,具有节省能源,设备简单,合金产品纯度高等优点。本文测得的析出电位及扩散系数为熔盐电解法制备铝锂合金提供了重要的参考数据。

关键词: 锂, 析出电位, 计时电位法, 扩散系数

Abstract: The deposition potenials of Li(I) on AI, Al-Cu, Al-RE and Mo electrodes and diffu-sion coefficient of lithium in liquid Al-Cu alloy have been measured by voltammetry andanodic chronopotentiometry respectively.A strong depolarization is observed in the depositionprocess of Li(I) on Al, Al-Cu, and Al-RE electrodes.In the range of 973~1073K, the co-relation between the diffusion coefficient and temperature can be represented by lnD = 5.70-16150/T.The experimental results show an increase in the chemical diffusion coefficientwith increasing lithium content in the alloy matrix at concentrations used.

Key words: lithium, deposition potential, chronopotentiometry, diffusion coefficient