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Citation: HAN Liyan, HAN Wei, WANG Guanjuan, SUN Yi, SUN Tingting. Preparation of Al-Li-La Alloys by Electrochemical Codeposition in LiCl-KCl-AlCl₃-La₂O₃ Melts[J]. Chinese Journal of Applied Chemistry, ;2013, 30(6): 698-704. doi: 10.3724/SP.J.1095.2013.20577 shu

Preparation of Al-Li-La Alloys by Electrochemical Codeposition in LiCl-KCl-AlCl₃-La₂O₃ Melts

HAN Liyan ^a, ,
HAN Wei ^b ,
WANG Guanjuan ^b ,
SUN Yi ^b ,
SUN Tingting ^b

a. Jilin Vocational College of Industry and Technology, Jilin 132013, China;
b. College of Materials Science and Chemical Engineeing, Harbin Engineering University, Harbin 150001, China

Received Date: 11 December 2012
Revised Date: 19 March 2013

Electrochemical codeposition of Al-Li-La alloys were investigated in molten LiCl-KCl-AlCl₃-La₂O₃ system. The results showed that chlorination of La₂O₃ by AlCl₃ led to the formation of LaCl₃ in the molten salts and promote the electrolytic preparation of Al-Li-La alloys. Transient electrochemical techniques,such as cyclic voltammetry and chronopotentiometry,were used to study the reaction mechanism. The electrochemical codeposition of Al,Li and La occurred when cathodic current densities were higher than 0.25 A/cm² in the LiCl-KCl-AlCl₃-La₂O₃ melts. The influencing factors such as electrolytic temperature,cathodic current density and electrolysis times on alloys were studied and the optimum electrolysis conditions were:a molten salt mixture of LiCl:KCl:AlCl₃:La₂O₃=45:45:5:2(mass raito),an electrolytic temperature of 650℃,a cathode current density of 12.5 A/cm²,and electrolysis time of 1 h. X-ray diffraction(XRD) indicated that the Al-LiLa alloys obtained by electrocodeposition mainly consisted of Al₂La,and βLi phases.
- Al-Li alloys,
- electrochemical codeposition,
- molten salts,
- La₂O₃
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Preparation of Al-Li-La Alloys by Electrochemical Codeposition in LiCl-KCl-AlCl3-La2O3 Melts

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Preparation of Al-Li-La Alloys by Electrochemical Codeposition in LiCl-KCl-AlCl₃-La₂O₃ Melts