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有色金属工程:2021,(3):-
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LiF-YF3-Y2O3电解质体系电导率的测定
(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)
Electrical Conductivity of LiF-YF3-Y2O3 Molten Salt System
Yu Bing1,2, Yan Qicao1,2, Kang Jia1,2, Zhang Quanjun1,2, Liu Yubao1,2, Hang Haitao1,2
(1.State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou,014030;2.China)
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投稿时间:2020-08-11    修订日期:2020-09-11
中文摘要: 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研究及节能增效。本研究在1173~1373 K下,使用CVCC法测定不同配比LiF-YF3、LiF-YF3(摩尔比1:1)-Y2O3体系的电导率,发现随着温度降低和熔盐中YF3、Y2O3含量的增加,熔盐电导率随之减小,这是由于大粒度络合离子的产生以及熔盐粘度的增加,导致了熔盐中小体积自由离子(如Li+和F-)的迁移阻力降低,使熔盐电导率下降。同时发现熔盐电导率随温度变化的规律符合Arrenius方程,并计算出熔盐的指前因子lna以及活化能E,通过拟合获得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,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了坚实理论基础。
Abstract:The electrical conductivity of LiF-YF3-Y2O3 molten salt is an important factor of mechanism study and energy conservation in the electrochemical preparation of yttrium alloy. The electrical conductivity of LiF-YF3and LiF-YF3(1:1)-Y2O3 molten salt has been measured by continuously varying cell constant(CVCC) technique with different concentrations and temperatures(1173~1373 K). The migration resistance of charged ions increased with the formation of large complex ions and change of molten salt viscosity, resulting to the electrical conductivity of molten salt increased with the increase of temperature and decrease of the concentration of YF3 and Y2O3. Dependence of the electrical conductivity ofbinary and ternary molten salt on temperature accord with the Arrhenius equation, and E and lna were calculated. The empirical equations of molten salts have been obtained by fitting quadratic equation, and the changeable rule of electrical conductivity was determined, which have established the theoretical foundation for the electrochemical preparation of yttrium alloy.
文章编号:     中图分类号:TF111    文献标志码:
基金项目:内蒙古自治区应用技术研究与开发资金项目(201802009); 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)
引用文本:
于兵,闫奇操,康佳,张全军,刘玉宝,黄海涛.LiF-YF3-Y2O3电解质体系电导率的测定[J].有色金属工程,2021,(3):.

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