摘要
研究了真空条件下直接电解TiO_2制备海绵钛过程中的电解电压。从理论上系统研究了真空状态对TiO_2和CaCl_2理论分解电压的影响,实验研究了TiO_2实际分解电压以及电解电压与产物纯度的关系。研究结果显示,在1200 K、10 Pa时,TiO_2和CaCl_2理论分解电压分别为2.51 V和3.86 V,TiO_2实际分解电压为2.53V,超电压为0.2V,考虑到加快电解速率和提高电解产物纯度,真空条件下电解电压的最佳范围在2.9～3.5 V之间,在此条件下进行电解,电解产物海绵钛的纯度达99.5%以上。
The voltages of direct electrochemical reduction of TiO： to sponge titanium in vacuum condition were studied in this paper. The effects of vacuum on the theoretical decomposition voltage of TiO2 and CaCl2 were studied in detail, relationship between the actual decomposition voltage of TiO2, the electrolyzing voltage to the purity of products were also studied by experiments. The results showed that the theoretical decomposition voltage of TiO2 and CaCl2 are 2.51V and 3.86V respectively, and the actual decomposition voltage of TiO2 is 2.53V, the super potential is 0.2V. The electrolytic voltage should be controlled between 2.9V to 3.5V because of fasting the electrolytic speed and improving the purity of electrolytic products. The content of titanium exceeds 99.5% in the spongy products on such condition.
出处
《中国有色冶金》
北大核心
2010年第3期56-58,74,共4页
China Nonferrous Metallurgy
基金
四川省重大科技公关项目资助(04GG001-019-02)
攀枝花学院博士基金项目资助
钒钛材料与复合技术四川省高校重点实验室资助
关键词
真空电解
TIO2
海绵钛
理论分解电压
实际分解电压
vacuum electrolysis
titanium dioxide
sponge titanium
theoretical decomposition voltage
actual decomposition voltage
