钕电解阳极过电位的测定  

Study of anodic overvoltage in neodymium electrolysis

作　　者：刘奎仁[1] 陈建设[1] 魏绪钧[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料与冶金学报》2003年第1期38-41,共4页Journal of Materials and Metallurgy

摘　　要：用慢扫描示波法测定了钕电解的阳极过电位 .考察了温度、阳极电流密度、Nd2 O3添加量、电解质组成等因素对阳极过电位的影响 ,探讨了降低阳极过电位的可能途径 .结果表明 ,阳极过电位随阳极电流密度的增加而增大 ,随温度的升高而减小 ,一定范围内 ,阳极过电位与阳极电流密度的对数呈线性关系 ,满足塔菲尔方程 ;电解质中LiF和Nd2 O3浓度增加 ,阳极过电位降低 ;适当控制阳极电流密度、升高温度、增加电解质中LiF和Nd2 O3的浓度并尽可能减小极间距 。The anodic overvoltage of neodymium electrolysis was determined by slow scanning oscillogram. The effects of some factors, i e. temperature, anodic current density, additional amount of Nd 2O 3 and compostion of the electrolyte were investigated and the approach to decrease the anodic overvoltage was also discussed. The results show that the anodic overvoltage increases with the anodic current density and decreases with temperature. The linear relation between the anodic overvoltage and the current density corresponding to Tafel equation is determined to some extent. The anodic overvoltage decreases with increasing the concentrations of LiF and NdF 3. It can also be decreased by controlling the anodic current density, increasing the temperature or the concentrations of LiF and NdF 3, and reducing pole distance.

关 键 词：阳极过电位 分解电压 氟化物 炼钕 熔盐电解 

分 类 号：TF845.6[冶金工程—有色金属冶金]