钕电解相关物质理论分解电压的计算

Theoretical Decomposition Voltage for Some Related Substance on Neodymium Electrolysis

本文计算了 Nd F3- L i F- Nd2 O3体系各物质的理论分解电压。结果表明 ,采用惰性阳极 ,理论分解电压按 Nd2 O3、Nd F3、L i F顺序依次增大 ,温度升高 ,理论分解电压降低 ;采用活性阳极 (石墨 )时 ,Nd2 O3与石墨反应生成 CO和 CO2 ,其理论分解电压较小 ,反应较易发生 ,尤以生成 CO的反应更易发生。但当电流密度较高或 Nd2 O3浓度较低时 ,可能生成碳氧氟化合物及氟碳化合物 ,并发生阳极效应 ,各物质的理论分解电压也随温度的升高而降低。

The theoretical decomposition voltage(also called EMF)for substances in NdF 3 LiF Nd 2O 3 system was figured out in present paper.The results indicate that the EMF in inactive anodes increases in sequence of Nd 2O 3,NdF 3 and LiF,and that it drops with rising of temperature.While using active materials as anode,such as graphite,Nd 2O 3 reacts with graphite,with CO or CO 2 as the product,the EMF is much lower.And the two reactions can occur much easier than the other reactions,especially that one whose product is CO. But at a higher current density or under a lower Nd 2O 3 concentration,COF n and C xF y may be obtained.As a result ,the anode effect can occur.The EMF on active anode decreases with temperature,too.