“液态介质-选择性氧电迁移”模式下稀土金属[O]杂质的行为

稀土金属提纯非金属杂质的理论及技术研发一直是稀土产业发展的“制高点”和“制约点”之一。围绕提纯过程中氧杂质深度脱除问题，提出“液态介质-选择性氧电迁移”模式，以[Csol,(+)|(F-Li-Ca)melt|(Pr-Nd)liq,(-)]体系为对象，运用高温快冷、交流电桥、有限差分等方法以及EPMA、XPS等现代分析仪器和计算技术，解析[(F-Li-Ca)melt|(Pr-Nd)liq]界面结构，明晰电场驱动下[Csol,(+)|(F-Li-Ca)melt|(Pr-Nd)liq,(-)]体系的物化特性，构建[(F-Li-Ca)melt|(Pr-Nd)liq,(-)]界面氧电迁移和双电层效应模型。通过揭示电场介入环境下[Csol,(+)|(Electrolyte)melt|(RE-M)liq,(-)]体系界面O的电场迁移行为规律，开发液态介质深度电迁移脱除单一氧杂质的技术原型。

The theory and technology of removing non-metallic impurities in the process of high purification of rare earth metals and alloys is one of the "highest point" and "constraint point" in the development of rare earth industry. In order to remove the oxygen impurity of rare earth metal deeply, the mode of Liquid medium-Selective oxygen electrotransport is proposed. The research object is [Csol,(+)|(F-Li-Ca)melt|(Pr-Nd)liq,(-)] system. Interface phase composition and structure of [(F-Li-Ca)melt|(Pr-Nd)liq] system, physical and chemical characteristics of [Csol,(+)|(F-Li-Ca)melt|(Pr-Nd)liq,(-)] system driven by electric field, the model of oxygen electrotransport and double layer effect at [(F-Li-Ca)melt|(Pr-Nd)liq,(-)] interface were investigated by modern research methods (high temperature quench, alternating current bridge, etc.) and modern instrument analysis and calculation technology (EPMA, XPS, finite difference, etc.). The purpose of the project is todevelop a prototype technology of removing single oxygen impurity by electrotransport of liquid medium.