熔盐电解法制备铝-钪合金电解质体系电化学性质研究

Study of electrochemical properties of electrolysis system of Al-Sc alloy preparation by molten salt

熔盐体系的电化学性质对熔盐电解过程有很大影响,通过选用铝电解工业通用的冰晶石-氧化铝体系作为熔盐电解制取铝钪合金的基本电解质体系,采用循环伏安法、线性伏安法和稳态极化法对Sc3+在冰晶石熔盐体系中铝电极上的电化学还原过程及氧化钪在石墨电极上的分解电压进行研究。结果表明,Sc3+在熔盐中电解还原过程为一步获得三个电子的简单电荷传递过程。

The electrochemical properties of molten salt system have significant impacts on molten salt electrolysis. In this paper, the Na3AlF6 -Al2O3 system was used as the basic electrolyzing system of prepartion Al - Sc alloy. The electro - chemical reduction process of Se^3＋ on Al pole and decomposition voltage of Sc2O3 on graphite pole in cryolite melt have been investigated by using cycling volt - cttrrent analysis, steady - state polarized method and linear volt - current analysis. The results show that the electrolysis reduction process of Sc^3＋ in melts is a simple electron transferring process by obtaining 3 electrons in one step.