熔盐电解法制备金属钛的氧空位导电机制和阴极结构的研究  

Study on Conductivity Mechanism of TiO2 with Oxygen Vacancies Prepared by FFC Process and Cathode Structures

作　　者：但林阳 刘楠[1] 李泽全[1] 李雪敏[1] Dan Linyang;Liu Nan;Li Zequan;Li Xuemin(Chongqing University,Chongqing 401331,China)

机构地区：[1]重庆大学,重庆401331

出　　处：《稀有金属材料与工程》2020年第8期2773-2778,共6页Rare Metal Materials and Engineering

基　　金：重庆大学教改项目(0220001104470);重庆市教委科学技术研究项目(KJQN201800106)。

摘　　要：熔盐电解法制备金属钛是取代高污染,高能耗的传统金属钛冶炼方法的重要工艺。但是,熔盐电解法所需时间长,效率低,是阻碍该法发展的瓶颈问题。因此,本研究以提升脱氧速度为目标,首先研究了试片厚度对反应速度的影响,再配合采用量子化学方法,分析了TiO2的氧空位导电机制。基于实验和计算结果,设计了多层阴极。多层TiO2阴极经6 h的电解后,得到了含氧量在0.35%~0.40%的金属钛,且各片产物没有明显差别。相比传统的阴极制备方法,电解速度得到有效提高。并且多层阴极解决了电解速度与产量的矛盾,为熔盐电解法的工业应用提供了有益的参考。FFC process is a vital method to replace the traditional titanium preparation methods that are of high pollution and high energy consumption.However,both low efficiency and long electrolysis time hinder the development of the FFC process.Therefore,in order to increase the deoxidation rate,the effect of cathode-geometry parameters on the deoxidation rate was investigated.Meanwhile,the quantum mechanics method was performed to analyze the conductivity mechanism of TiO2 with oxygen vacancies.Based on the experimental and calculated results,a multi-layer cathode was proposed to improve the deoxidation rate.The titanium sponge with oxygen content of 0.35%~0.40%was obtained after 6 h electrolysis using this cathode,and thus the electrolysis speed was effectively improved compared to the traditional cathode.Another benefit of the multi-layer cathode is to solve the contradiction between the deoxidation rate and production of the FFC process.

关 键 词：熔盐电解法 二氧化钛 氧空位 几何参数 

分 类 号：TF111[冶金工程—冶金物理化学] TG146.23[一般工业技术—材料科学与工程]