NdF_3-LiF-Nd_2O_3体系熔盐电导率影响因素的研究  

Study on Influencing Factors of Electrical Conductivity of NdF_3-LiF-Nd_2O_3 Molten Salt

作　　者：章珏 郑鑫 梁金 刘红霞 彭光怀 张小联 

机构地区：[1]赣南师范学院化学化工学院,江西赣州341000 [2]赣州飞腾轻合金有限公司,江西赣州341000

出　　处：《稀有金属与硬质合金》2014年第4期17-21,共5页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(51064001)

摘　　要：采用交流阻抗谱法确定熔盐电阻,用连续变化电导池常数法(CVCC)研究NdF3-LiF-Nd2O3熔盐体系电导率,确定了温度、熔盐组分与熔盐电导率之间的回归方程。重点研究和分析了熔盐电导率与NdF3含量之间的关系,以及熔盐内部离子浓度与电荷定向迁移阻力之间的相互作用。结果表明,当温度和LiF含量增大、Nd2O3含量和NdF3含量减少时,熔盐电导率呈增大趋势;当温度一定时,熔盐电导率主要取决于离子浓度和电荷定向迁移阻力的共同作用,其中电荷定向迁移阻力对熔盐电导率的影响更大。After measurement of the resistance of molten salt with the AC impedance spectrum method,the electrical conductivity of Nd2O3-NdF3-LiF molten salt was tested by continuously varying cell constant （CVCC） technique. Meanwhile, the regression equations between the temperature, component of molten salt and its electrical conductivity were developed. The study is focused on the relations between the electrical conductivity and NdF3 content, and interaction between the ion concentration and the directional migration resistance of molten salt charge is analyzed. The results show that the electrical conductivity of the melt increases with the increase of temperature and LiF content,but decreases with increasing Nd2O3 and NdF3 content. At given temperature,the electrical conductivity of molten salt depends on the concentration of the ions and the resistance of directional migration of charge, especially on the resistance of directional migration of charge.

关 键 词：NdF3-LiF—Nd2O3 电导率 回归方程 CVCC法 交流阻抗谱 

分 类 号：TF111.522[冶金工程—冶金物理化学]