【作者】 陈朝轶； 鲁雄刚； 李重和； 邹星礼； 黄少卿；

【Author】 Chen Chaoyi~(1,2) Lu Xionggang~(1*) Li Chonghe~1 Zou Xingli~1 Huang Shaoqing~1 (1.School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;2.College of Materials Science and Metallurgy Engineering,Guizhou University,Guiyang 550003,China)

【机构】 上海大学材料科学与工程学院； 贵州大学材料科学与冶金工程学院；

【摘要】 在 CaCl₂熔盐中,利用固体透氧膜（SOM）法电解 TiO₂制取了金属钛。结果表明,阴极片的烧结温度、电解时间以及反应器内氧分压是影响电解的重要因素:电解过程不会发生副反应,1100℃电解6 h 的试样完全被还原成金属钛; 循环伏安曲线表明,SOM 法对 TiO₂的电解由外向内、由高价向低价分两步进行,即 TiO₂→TiO→Ti,由于熔盐/YSZ 膜界面处发生极化,导致第一个还原峰电位负向移动。更多还原

【Abstract】 A new process Solid Oxygen-ion conducting Membrane （SOM） to produce metal Ti directly from TiO₂ in molten CaCl₂ was proposed. The result showed that the sintering temperature of cathode pellets, electrolytic time and oxygen press in the reactor played important role in electrolysis. No side reaction was found during reduction process. The TiO₂ pellet was reduced fully to metal Ti when electrolysis run for 6 h at 1100 ℃. The CV curve showed that the reduction is conducted in two steps using SOM process, firstly TiO₂ is reduced to TiO, then TiO is reduced to Ti, and step by step from outside of cathode pellet to inside. Polarization happened in interface of the molten/YSZ, which led to the potential of first reduce peak being more negative than FFC process.更多还原