STUDY OF ANODIC OVERVOLTAGE IN NEODYMIUM ELECTROLYSIS
来源期刊：Acta Metallurgica Sinica2003年第5期
论文作者：Q.Han K.R.Liu J.S.Chen X.J.Wei
Key words：neodymium electrolysis; anodic overvoltage; deposition voltage; fluoride;
Abstract: The anodic overvoltage of neodymium electrolysis was determined by slow scanning oscillogram. The effects of some factors, i.e. the temperature, the anodic current density, the concentration of Nd2O3 and the components of the electrolyte were investigated and the approaches to decrease the anodic overvoltage were also discussed. The results show that the anodic overvoltage increases with the anodic current density and decreases with the increasing 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 the increasing concentrations of LiF and NdF3. It also decreases by controlling the anodic current density properly, increasing the temperature or the concentrations of LiF and NdF3 and the reducing polar distance.
Q.Han1，K.R.Liu1，J.S.Chen1，X.J.Wei1
(1.School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract:The anodic overvoltage of neodymium electrolysis was determined by slow scanning oscillogram. The effects of some factors, i.e. the temperature, the anodic current density, the concentration of Nd2O3 and the components of the electrolyte were investigated and the approaches to decrease the anodic overvoltage were also discussed. The results show that the anodic overvoltage increases with the anodic current density and decreases with the increasing 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 the increasing concentrations of LiF and NdF3. It also decreases by controlling the anodic current density properly, increasing the temperature or the concentrations of LiF and NdF3 and the reducing polar distance.
Key words:neodymium electrolysis; anodic overvoltage; deposition voltage; fluoride;
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