摘要
通过循环伏安法、恒槽压电解并结合SEM、XRD和氧氮分析法研究了LiCl-NaCl熔盐中金属钽的电化学脱氧过程,并考察了石墨阳极气体对脱氧过程的影响。研究结果表明:在LiCl-NaCl熔盐体系中,利用电解可有效降低金属钽中的氧含量,脱氧反应包括Ta_(2)O_(5)→Ta(O)+LiTaO_(3)和Ta(O)+LiTaO_(3)→Ta。熔盐电化学脱氧利用电子作为还原剂,在-2.8 V恒槽压下电解10 h后可脱除钽粉中10%的氧,电化学脱氧过程促进了钽颗粒间的烧结。
The electrochemical deoxidation process of tantalum in molten LiCl-NaCl was studied by cyclic voltammetry and constant cell voltage electrolysis,along with SEM,XRD and oxygen-nitrogen analysis techniques.The effect of graphite anode gas on the deoxidation process was investigated.The research results show that in LiCl-NaCl molten salt system,the oxygen content in tantalum can be effectively reduced by electrolysis,and the deoxidation reactions include Ta_(2)O_(5)→Ta(O)+LiTaO_(3) and Ta(O)+LiTaO_(3)→Ta.The molten salt electrochemical deoxidation process employs electrons as the reducing agent,and 10%oxygen is removed by electrolyzing tantalum powder at-2.8 V for 10 h.Besides,electrochemical deoxidation promotes the sintering of tantalum particles.
作者
陈义武
谢宏伟
屈佳康
陈瑞祥
尹华意
CHEN Yi-wu;XIE Hong-wei;QU Jia-kang;CHEN Rui-xiang;YIN Hua-yi(China National Nuclear Industry Corporation 404,Jiayuguan 735100,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2021年第1期13-18,共6页
Rare Metals and Cemented Carbides
基金
国家重点研发计划资助项目(2017YFB0305401)。
关键词
熔盐电解
金属钽
电化学脱氧
五氧化二钽
循环伏安法
molten salt electrolysis
tantalum
electrochemical deoxidation
tantalum oxide
cyclic voltammetry
