| 温度和钇含量对LiF-YF3-Y2O3电解质体系电导率的影响 |
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| 引用本文： | 于兵,康佳,黄海涛,张全军,刘玉宝,闫奇操. 温度和钇含量对LiF-YF3-Y2O3电解质体系电导率的影响[J]. 有色金属工程, 2021, 0(3) |
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| 作者姓名： | 于兵 康佳 黄海涛 张全军 刘玉宝 闫奇操 |
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| 作者单位： | 包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室 |
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| 基金项目： | 北方稀土科技开发项目(2019H2079);白云鄂博稀土资源研究与综合利用国家重点实验室自主课题(2018Z2002,2019Z2055,2020Z2132)。 |
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| 摘 要： | LiF-YF3-Y2O3体系的电导率直接关系到熔盐电解法制备稀土钇合金过程的机理及节能增效。在1173~1373 K,使用连续变化电导池常数法(CVCC)法测定不同配比LiF-YF3、LiF-YF3-Y2O3体系的电导率,发现熔盐电导率随着温度的降低和熔盐中YF3、Y2O3含量的增加而减小,原因是大粒度络合离子的产生以及熔盐黏度的增加,导致熔盐中小体积自由离子(如Li+和F-)的迁移阻力降低;熔盐电导率随温度变化的规律符合Arrenius方程。通过拟合获得了合理的二元和三元熔盐电导率与成分、温度之间的经验公式,可用来确定熔盐电导率的变化规律,为熔盐电解法制备钇合金奠定理论基础。
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| 关 键 词： | 电导率 LiF-YF3-Y2O3熔盐 CVCC 温度 |
Effects of Temperature and Yttrium Content on Conductivity of LiF-YF3-Y2O3Molten Salt System |
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| YU Bing,KANG Jia,HUANG Haitao,ZHANG Quanjun,LIU Yubao,YAN Qicao. Effects of Temperature and Yttrium Content on Conductivity of LiF-YF3-Y2O3Molten Salt System[J]. Nonferrous Metals Engineering, 2021, 0(3) |
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| Authors: | YU Bing KANG Jia HUANG Haitao ZHANG Quanjun LIU Yubao YAN Qicao |
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| Affiliation: | (State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China) |
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| Abstract: | The conductivity of LiF-YF3-Y2O3 molten salt system is directly related to the mechanism,energy saving and efficiency improvement of rare earth yttrium alloy prepared by molten salt electrolysis.The conductivity of LiF-YF3and LiF-YF3-Y2O3molten salt systems with different ratios was measured by CVCC method at 1173—1373 K.It was found that the conductivity of molten salt decreased with the decrease of temperature and the increase of YF3 and Y2O3 contents in molten salt.The reason may be that the generation of large particle size complex ions and the increase of viscosity of molten salt lead to the decrease of migration resistance of small volume free ions(such as Li+and F-)in molten salt;the conductivity of molten salt changes with temperature.The law is in accordance with Arrenius equation.The reasonable empirical formula between conductivity of binary and ternary molten salt and composition and temperature was obtained by fitting,which can be used to determine the change rule of molten salt conductivity,which laid theoretical foundation for the preparation of yttrium alloy by molten salt electrolysis. |
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| Keywords: | electrical conductivity LiF-YF3-Y2O3molten salts CVCC temperature |
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