Direct Electrochemical Extraction of Ti_5Si_3 from Ti/Si-Containing Metal Oxide Compounds in Molten CaCl_2  

作　　者：邹星礼 鲁雄刚 肖玮 周忠福 钟庆东 丁伟中 

机构地区：[1]Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,School of Materials Science and Engineering,Shanghai University [2]Centre for Advanced Functional Materials and Devices,Aberystwyth University

出　　处：《Journal of Shanghai Jiaotong university(Science)》2013年第1期111-117,共7页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China(No.51074105);the China Postdoctoral Science Foundation(No.2012M520873);China National Funds for Distinguished Young Scientists (No.51225401)

摘　　要：Direct electrochemical extraction of TisSia from pressed cathode pellets comprising of powdered Ti/Si- containing metal oxide compounds was investigated by using molten salt electro-deoxidation technology. Three groups of mixtures including TiO2 mixed with SiO2, Ti-bearing blast furnace slag （TBFS） mixed with TiO2, and TBFS mixed with high-titanium slag （HTS） were prepared at the same stoichiometric ratio （Ti ： Si = 5 ： 3） corresponding to the target composition of Ti5Si3, and used as the starting materials in this experiment, respec- tively. The pressed porous cylindrical pellet of the Ti/Si-contalning compounds served as a cathode, and two different anode systems, i.e., the inert solid oxide oxygen-ion-conducting membrane （SOM） based anode system and graphite-based anode system were used contrastively. The electrochemical experiment was carried out at 900--1050℃ and 3.0--4.0V in molten CaCl2 electrolyte. The results show that the oxide components were electro-deoxidized effectively and Ti5Si3 could be directly extracted from these complex Ti/Si-containing metal oxide compounds.Direct electrochemical extraction of Ti5Si3 from pressed cathode pellets comprising of powdered Ti/Sicontaining metal oxide compounds was investigated by using molten salt electro-deoxidation technology.Three groups of mixtures including TiO2 mixed with SiO2,Ti-bearing blast furnace slag（TBFS） mixed with TiO2, and TBFS mixed with high-titanium slag（HTS） were prepared at the same stoichiometric ratio（Ti:Si=5:3） corresponding to the target composition of Ti5Si3,and used as the starting materials in this experiment,respectively. The pressed porous cylindrical pellet of the Ti/Si-containing compounds served as a cathode,and two different anode systems,i.e.,the inert solid oxide oxygen-ion-conducting membrane（SOM） based anode system and graphite-based anode system were used contrastively.The electrochemical experiment was carried out at 900-1050℃and 3.0-4.0 V in molten CaCl2 electrolyte.The results show that the oxide components were electro-deoxidized effectively and Ti5Si3 could be directly extracted from these complex Ti/Si-containing metal oxide compounds.

关 键 词：ELECTRO-DEOXIDATION oxide compounds TisSi3 molten salts solid oxide oxygen-ion-conducting mem- brane （SOM） 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TQ151.9[金属学及工艺—金属材料]