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Founded in 1987， Bimonthly
Supervisor：Jiangxi University Of Science And Technology
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Jiangxi Nonferrous Metals Society
ISSN：1674-9669
CN：36-1311/TF
CODEN YJKYA9
Volume 15 Issue 2
Apr.  2024
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PENG Junjun, WANG Xu, CAI Boqing, SHI Zhongning, REN Rushan. Investigation on the density of LiF-[CaF2/YbF3]-Yb2O3 molten salt and Yb-Ni alloy[J]. Nonferrous Metals Science and Engineering, 2024, 15(2): 189-194. DOI: 10.13264/j.cnki.ysjskx.2024.02.005
Citation: PENG Junjun, WANG Xu, CAI Boqing, SHI Zhongning, REN Rushan. Investigation on the density of LiF-[CaF2/YbF3]-Yb2O3 molten salt and Yb-Ni alloy[J]. Nonferrous Metals Science and Engineering, 2024, 15(2): 189-194. DOI: 10.13264/j.cnki.ysjskx.2024.02.005
shu

Investigation on the density of LiF-[CaF2/YbF3]-Yb2O3 molten salt and Yb-Ni alloy

  • 1.

    Faculty of Material Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou341000, Jiangxi, China

  • 2.

    School of Metallurgy, Northeastern University, Shenyang110006, China

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  • Received Date: December 01, 2022
  • Revised Date: May 14, 2023
  • Available Online: May 05, 2024
    Graphical Abstract
    • Abstract

  • The density of LiF-[CaF2/YbF3]-Yb2O3 molten salt system is an important parameter for preparing rare earth Yb alloy by electrolysis. In this paper, Archimedes method was used to measure and analyze the density of LiF-[CaF2/YbF3]-Yb2O3 system and its changing rule in the temperature range of 1 173 - 1 573 K. Meanwhile, mathematical models were used to estimate the density of Yb-Ni alloy and analyze its separation characteristic between molten salt and alloy during electrolysis. The results showed that the density of the system (LiF-CaF2)eutand (LiF-YbF3)eut system decreased linearly with higher temperature, and the molar volume increased linearly with rising temperature. Moreover, the excess volume of (LiF-YbF3)eut system decreased linearly with the temperature. In the range of Yb2O3 ratio from 0 to 4wt% with the temperature ranging between 1 173 and 1 573 K, the density of (LiF-CaF2)eut-Yb2O3 and (LiF-YbF3)eut-Yb2O3 molten salt systems decreased linearly as the temperature rised. When the temperature was constant, (LiF-CaF2)eut-Yb2O3 system increased linearly in the range of 0≤x(Yb2O3)≤2.5%, while (LiF-YbF3)eut-Yb2O3 system increased linearly in the range of 0≤x(Yb2O3)≤3.5%. The density of Yb-Ni alloy was higher than that of LiF-[CaF2/YbF3]-Yb2O3 molten salt system so that it was easier to be separated by electrolysis.

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