Extraction of ytterbium via co-reduction of Al(III) and Yb(III) from LiCl–KCl melt on W electrode

Li, Xing; Yan, Yong−De; Zhang, Milin; Xue, Yun; Tang, Hao; Zhou, Zhiping; Yang, Xiao-Nan; Zhang, Zhijian

doi:10.1007/s10967-013-2785-3

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The similar phenomenon occurs in the process of the electrochemical extraction of europium 10 and yttbium. 44 When the potential reaches to −0.75 V, the reduction signal C appears, and the corresponding oxidation signal C is detected at around −0.61 V. At this point, the oxidation signal D does not appear. When the scanning range of cyclic voltammogram is switched from 0 V to −1.1 V. The oxidation signal D is detected.…”

Section: Resultsmentioning

confidence: 95%

Study on Electrochemical Behavior of La(III) and Preparation of Al−La Intermetallic Compound Whiskers in Chloride Melt

Yan

Zhang

et al. 2015

J. Electrochem. Soc.

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This paper exhibits a novel method to prepare the Al−La intermetallic compound whiskers on the liquid magnesium electrode at 1023 K. The electrochemical behavior of La (III) on a tungsten electrode in LiCl−KCl−MgCl 2 −AlCl 3 −LaCl 3 melts was investigated by different electrochemical measurements. The result from chronopotentiometry shows that co-deposition of Mg(II), Li(I), Al(III) and La(III) ions occurs when the current intensity more than −190 mA. Quarternary Mg-Li-Al-La alloy was prepared by galvanostatic electrolysis, and the Al 4 La intermetallic compound was identified via X-ray diffraction (XRD). The microstructure and micro−zone chemical analysis of Mg−Li−Al−La alloy were accomplished by scanning electron microscopy (SEM) with energy dispersive spectrometry (EDS). The results illustrate that lots of needle-like precipitates are synthesized on magnesium substrate. The crystal structure of needle-like precipitates was certified by transmission electron microscopy (TEM) with electron diffraction pattern. The result exhibits that the needle-like precipitates are Al−La intermetallic compound whiskers. The micro hardness of Mg−Li−Al−La alloy is remarkable improved with the help of Al−La intermetallic compound whiskers. Along with the development of the economy, the energy consumption issue and environmental protection have become the theme of the world. With this problem, the superlight materials have attracted much attention. Magnesium−lithium alloys are considered to the most promising new energy materials, which have drawn more and more attention by the industry of aerospace and microelectronic because of the advantages of the low density, high specific strength, good machinability, damping ability and high energetic particle penetration resistance.1-4 Nevertheless, the widespread use of magnesium−lithium alloys is limited by the poor mechanical properties of alloy, especially the hardness.The definition of the whisker was given by Cevans et al.: 5 the crystal structure of the whisker is single-crystal structure, the ratio of the length to diameter is between 5 and 1000. The diameter of whisker is falling in 20 to 100 nanometer. Many researchers [6][7][8][9] have adopted the whiskers to improve the mechanical properties of magnesium−lithium alloys. On account of the binding force between the whisker and the magnesium−lithium alloys substrate is limited by the adscititious whisker, the mechanical properties of the magnesium−lithium alloy are not likely to see a great promotion. In our prior work, for the extraction of europium and formation of Al−Li−Eu alloy, most of needle-like precipitates can be formed in aluminum substrate.10 The needle-like precipitates grow through several grains and across grain boundaries. Such long needle-like precipitates should act as pins to increase the boundary strength and improve the properties of alloy. Therefore, the thought of whether the mechanical properties of the magnesium−lithium alloys can be improved by the formation of Al−RE intermetallic compound whiskers in mag...

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Section: Resultsmentioning

confidence: 95%

Study on Electrochemical Behavior of La(III) and Preparation of Al−La Intermetallic Compound Whiskers in Chloride Melt

Yan

Zhang

et al. 2015

J. Electrochem. Soc.

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“…The electrochemical behavior of ytterbium species in fused alkali chlorides was studied in 3LiCl-2KCl, NaCl-KCl, 6NaCl-9KCl-5CsCl, NaCl-2CsCl and CsCl based melts employing stationary and transient electrochemical methods (electromotive force measurements, linear, cyclic and square wave voltammetry, and chronopotentiometry) (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). Formal standard red-ox potentials (E* Yb(II)/Yb(III) ) and diffusion coefficients of the electroactive species were determined using the transient methods.…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical Study of Divalent Ytterbium Species in NaCl–KCl and NaCl–KCl–CsCl Based Melts

2018

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“…Recently, our group has successfully extracted Tm on zinc cathode. 21 Shi et al 22 investigated the co-reduction of Sm(III) and Zn(II) ions on the Mo electrode and the under potential deposition of Sm(III) ions on the liquid Zn electrode. They found that the recovery rate of Sm from the LiCl-KCl-SmCl 3 (2 wt%) melt can reach to 94.5% by the electrolysis on the liquid Zn electrode.…”

Section: Introductionmentioning

confidence: 99%

Electrochemistry of Zn and co-reduction of Zn and Sm from LiCl–KCl melt

et al. 2015

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Extraction of ytterbium via co-reduction of Al(III) and Yb(III) from LiCl–KCl melt on W electrode

Cited by 9 publications

References 32 publications

Study on Electrochemical Behavior of La(III) and Preparation of Al−La Intermetallic Compound Whiskers in Chloride Melt

Study on Electrochemical Behavior of La(III) and Preparation of Al−La Intermetallic Compound Whiskers in Chloride Melt

An Electrochemical Study of Divalent Ytterbium Species in NaCl–KCl and NaCl–KCl–CsCl Based Melts

Electrochemistry of Zn and co-reduction of Zn and Sm from LiCl–KCl melt

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