固态原位电还原TiO_2制取Ti的阳极和电极过程  

Investigation of Anode and Electrode Processes of Solid State in Situ Electrochemical Reduction from TiO_2 to Ti

作　　者：关长龙[1] 张廷安[1] 豆志河[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第9期1307-1310,共4页Journal of Northeastern University(Natural Science)

基　　金：中央高校基本科研业务费专项资金资助项目(N110202003)

摘　　要：运用循环伏安法对固态原位电还原TiO2制取Ti的阳极过程进行了研究,并分析了整个电极反应过程.研究发现,固态原位电还原TiO2制取Ti的阳极过程是一步二电子氧化反应,并且可逆,产物不熔,在石墨阳极下生成CO2气体,阳极电极反应:C+2O2--4e=CO2.固态原位电还原TiO2制取Ti的总电极反应为:2TiO2+C=2TiO+CO2,2TiO+C=2Ti+CO2,2CaO+C=2Ca+CO2.阴极生成的Ca可以继续对TiO2进行热还原反应,固态原位电还原TiO2制取Ti是TiO2的直接二步电还原与Ca热还原TiO2共同作用的结果.The anode process of solid state in situ electrochemical reduction from TiO2 to Ti was studied by cyclic vohammetry and the whole electrode process was analyzed. The results show that the anode process is a one-step reversible oxidizing reaction of two-charge with the products undissolved and CO2 is produced at carbon anode. The anode reactions can be expressed as C ＋ 202- - 4e = CO2. The general electrode reactions can be expressed as 2TIO2 ＋ C = 2TiO ＋ CO2, 2TiO ＋ C = 2Ti ＋ CO2, 2CaO ＋ C = 2Ca ＋ CO2. The Ca produced at cathode can also continue the thermo-reduction reactions. The reduction of TiO2 to Ti is attributed to the directly electrochemical reduction of TiO2 and calciothermic reaction when there is a few amount of Ca in the CaC12 melt.

关 键 词：钛 电化学还原 阳极过程 电极过程 循环伏安法 

分 类 号：TF823[冶金工程—有色金属冶金] TF801.1