An electrochemical method for the preparation of Mg–Li alloys at low temperature molten salt system

Zhang, M.L.; Yan, Yong De; Hou, Zhi Yao; Fan, Louzhen; Chen, Z.; Tang, Dingxiang

doi:10.1016/j.jallcom.2006.09.056

Cited by 44 publications

(23 citation statements)

References 7 publications

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“…Therefore, electrochemical methods for the preparation of magnesium base alloys are drawing increased attention. In our previous study, we have successfully prepared Mg-Li alloys on a magnesium cathode from the LiCl-KCl melts and investigated the electrochemical formation process and phase control of Mg-Li alloys at 693-783 K [6,7]. However, in these methods, remaining some shortcomings include a long process time and high energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Zhang

Chen

et al. 2010

J Appl Electrochem

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This study presents a novel electrochemical study on the codeposition of Mg, Li, and Mn on a molybdenum electrode in LiCl-KCl-MgCl 2 -MnCl 2 melts at 893 K to form different phases Mg-Li-Mn alloys. Transient electrochemical techniques such as cyclic voltammetry, chronopotentiometry, and chronoamperometry have been used in order to investigate the codeposition behavior of Mg, Li, and Mn ions. The results obtained show that the potential of Li metal deposition, after the addition of MgCl 2 and MnCl 2 , is more positive than the one of Li metal deposition before the addition. The codeposition of Mg, Li, and Mn occurs at current densities lower than -1.43 A cm -2 in LiCl-KCl-MgCl 2 (8 wt%) melts containing 2 wt% MnCl 2 . The onset potential for the codeposition of Mg, Li, and Mn is -2.100 V. a, a ? b, and b phases Mg-Li-Mn alloys with different lithium and manganese contents were obtained via galvanostatic electrolysis from LiCl-KCl melts with different concentrations of MgCl 2 and MnCl 2 . The microstructures of typical a and b phases of Mg-Li-Mn alloys were characterized by X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy (SEM). The analysis of energy dispersive spectrometry (EDS) and EPMA area analysis showed that the elements of Mg and Mn distribute homogeneously in the Mg-Li-Mn alloys. The results of inductively coupled plasma analysis determined that the chemical compositions of Mg-Li-Mn alloys correspond with the phase structures of XRD patterns, and lithium and manganese contents of Mg-Li-Mn alloys depend on the concentrations of MgCl 2 and MnCl 2 .

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Section: Introductionmentioning

confidence: 99%

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Zhang

Chen

et al. 2010

J Appl Electrochem

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“…[6] Our group has exploited successfully a relatively simpler electrochemical method in which the codeposition of the Mg-Li binary alloys is achieved on a molybdenum at KCl-LiCl (50:50 wt pct) melts containing different MgCl 2 concentrations at 943 K (670°C). [7] Nowadays, the electrochemical codeposition has been used widely to prepare alloys. Iida et al [8][9][10] investigated the electrochemical codeposition of Sm-Co alloys from LiCl-KCl-SmCl 3 -CoCl 2 melts, and they studied electrochemical formation of Yb-Ni and Sm-Ni alloy films by Li codeposition method from chloride melts.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Codeposition of Quaternary Mg-Li-Ce-La Alloys from Molten Salt

Han

Zhang

et al. 2010

Metall Mater Trans B

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This article presents a novel study on electrochemical codeposition of Mg-Li-Ce-La alloys on a molybdenum in LiCl-KCl-MgCl 2 -KF melts containing RE 2 (CO 3 ) 3 (rich in cerium) at a temperature range of 953 K to 1073 K (680°C to 800°C). The cyclic voltammetry proved the feasibility of the production of the alloys. The factors that affect the current efficiency were investigated. The optimal electrolytic temperature and cathodic current density was 1023 K (750°C) and 15.9 AAEcm À2 , respectively. The chemical content, phases, morphology, and distribution of alloy elements were analyzed by inductively coupled plasma mass spectrometry, X-ray diffraction, and scanning electron microscopy, respectively. The intermetallic compounds between Mg and Ce (La) distribute in the grain boundary of the alloys, present as reticulate structures, and refine the grains.

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“…Because the amount of CaO-B 2 O 3 sintered sample used in the experiment was 10 g, the theoretical output of CaB 6 was calculated to be 3.96 g. According to the actual output of CaB 6 (1.03 g) collected during the experiment, the product formation rate only reached 25%. Based on the experimental fact that the CaO-B 2 O 3 sintered samples were deposited at the bottom of the crucible after completion of the electrolytic run, we can further infer that the lower product formation rate is attributed to the slow diffusion of the CaO-B 2 O 3 sintered samples in the molten salt [10,11]. In the high temperature CaCl 2 -NaCl molten salt, CaO has better solubility and diffuses more easily in the molten salt through molecular heat-proliferation movement.…”

Section: Resultsmentioning

confidence: 85%

An electrochemical method for the preparation of CaB6 crystal powder

Wang

Zhai

2009

J Appl Electrochem

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Calcium boride (CaB 6 ) crystal powder was prepared by electrolysis in a molten salt electrolyte of 50% CaCl 2 -50% NaCl (molar%) at 750°C. The current efficiency and product formation rate during the electrolysis were studied based on the experimental data. The electrolytic products including the CaB 6 crystal particles were analyzed by X-ray diffractometry and scanning electron microscopy. Cyclic voltammetry was used to study the electroreduction mechanism of the reactive species. The results demonstrate that the rate of electrolytic reduction is determined by the diffusion rate of the reactive species in the molten salt.

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An electrochemical method for the preparation of Mg–Li alloys at low temperature molten salt system

Cited by 44 publications

References 7 publications

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Study on the preparation of Mg–Li–Mn alloys by electrochemical codeposition from LiCl–KCl–MgCl2–MnCl2 molten salt

Electrochemical Codeposition of Quaternary Mg-Li-Ce-La Alloys from Molten Salt

An electrochemical method for the preparation of CaB6 crystal powder

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