Determination of ohmic/voltage drop and factors influencing anodic overvoltage of carbon anodes in Na3AlF6-Al2O3 based melts
来源期刊：中国有色金属学报(英文版)2003年第3期
论文作者：李庆余 李劼 田忠良 张刚
文章页码：699 - 703
Key words：ohmic/voltage drop; anodic overvoltage; aluminum electrolysis
Abstract: Experimental technique has been inadequate to anodic overvoltage measurements in aluminum electrolysis. To determine its ohmic/voltage drop precisely, a current interruption technique was modified with a high frequency digital oscilloscope, current interrupters with fast switching time, an improved cell configuration and a simulation applied to the oscillating potential decay curve. The results show that the technique can give good reproducibility for overvoltage studies. A substantial increase of anodic overvoltage is observed with graphite powder addition, metallic aluminum addition and CO bubbling in the melts.
基金信息：the National Key Fundamental Research and Development Program of China
