Study of Back Electromotive Force in the Preparation of Al-Ca Alloy by Molten Salt Electrolysis Method

Abstract:

Al-Ca master alloy was prepared by molten salt electrolysis method, using a mixed molten salt system of CaCl_2-CaF₂ and feeding CaO as electrolysis material. The technological parameters such as back electromotive force (BEMF), cell voltage, and current were measured by testing device of molten salt electrolysis. The effects of current density, CaO addition, electrolysis time and feeding period on the back electromotive force in the electrolysis process are studied. The results indicate that back electromotive force increases with current density increasing, the feeding period is 30min measured by potential control method. Finally, the Al-Ca alloy with the Ca content of 11.6wt% can be obtained by electrolyzing for 1h at the current of 7A and at 740.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 2765-2768
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.2765
• Online since: May 2011
• Authors: Yi Yong Wang, Hui Jin, Fa Yu Wu, Ji Dong Li, Zhi Ying Wang
• Keywords: Back Electromotive Force, Current Density, Feeding Period, Molten Salt Electrolysis

References

[1] Jidong Li, Mingjie Zhang, Tingan Zhang: The Chinese Journal of Nonferrous Metals, Vol. 18 (2008), p.1555.(in Chinese)

[2] Shaohua Yang, Yungang Ban, Yuhua Guo: Journal of Northeastern University (Natural Science), Vol. 8(207), p.839. (in Chinese)

[3] Metilos-hukovic M: J.Power Source, Vol. 64 (1997), p.13.

[4] Yong Yang, Yongcheng Chai, Guochun Teng: Journal of Materials and Metallurgy, Vol. 9(2010), p.97.

[5] James P Hoare, Charles R W: Corrosion Science, Vol. 15 (1975), p.435.

[6] Z X Qiu, M Zhang: Aluminum, Vol. 66(1990), p.560.