通过在阴极制备工艺、电解槽设计及熔盐预处理等方面的改进,电化学直接还原TiO2得到了纯度较高的金属钛.采用配有X光电子能谱仪(XPS)的扫描电镜(SEM)、X射线衍射(XRD)、化学分析等方法对电化学还原样品进行分析,确定TiO2阴极的还原是由表及里、由高价到低价再到金属进行的.对还原过程分析表明:反应器内副反应的发生是影响还原过程电流效率低的主要因素.并探索性地提出了提高电流效率的几条途径.
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