TiOx＜1粉体在电脱氧过程中的氧移除和持续性形貌转变
Oxygen removal and subsequent morphology transformation of TiOx＜1 powders in electrodeoxidation process
周新宇 1豆志河 1张廷安 2张晨 2杜道光2
作者信息
- 1. Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education,Shenyang 110819,China
- 2. School of Metallurgy,Northeastern University,Shenyang 110819,China
- 折叠
摘要
在本研究中,将二氧化钛和镁粉以自蔓延燃烧合成制备的TiOx＜1粉末用作阴极,通过电化学脱氧工艺制备低氧钛粉.利用电化学分析、XRD、SEM、XPS、TEM等测试表征手段研究了电化学脱氧过程中TiOx＜1粉末的脱氧过程、成分和形貌转变.结果表明:TiOx＜1粉末电脱氧后的残余氧含量与还原时间呈线性关系.电脱氧2 h后,在氧含量低于0.35wt%的钛颗粒之间可观察到明显的烧结颈.钛晶格中的氧移除促进了钛原子的表面扩散,从而导致TiOx＜1粉末在电脱氧过程中的烧结和持续性长大.随着残余氧含量的降低和脱氧时间的延长,TiOx＜1粉末形貌从团聚的小颗粒状转变为珊瑚状和多孔片状.
Abstract
In this study,TiOx＜1 powders obtained from the combustion synthesis of TiO2 and Mg was used as cathode to prepare low-oxygen titanium powders by electrochemical deoxidation process.The mechanism of oxygen removal,composition and morphology change of TiOx＜1 powders during electrode oxidation were investigated.The residual oxygen content in electrodeoxidized TiOx＜1 powders is linearly related to the deoxidation time.An obvious sintering neck between titanium particles with less than 0.35wt%oxygen could be observed after electrodeoxidation for 2 h.The removal of oxygen from Ti lattice promotes the surface diffusion of titanium atoms and leads to subsequent sintering and growth of TiOx＜1 powders in electrodeoxidation.The morphology of TiOx＜1 powders was transformed into coral and porous flakes from agglomerated small particles with a decrease in residual oxygen content and an extension of deoxidation time.
关键词
钛冶金/钛粉/电脱氧/形貌转变Key words
titanium metallurgy/titanium powders/electrochemical deoxidation/morphology引用本文复制引用
基金项目
Fundamental Research Funds for Central Universities,China(N2225012)
Fundamental Research Funds for Central Universities,China(N2224001-9)
National Natural Science Foundation of China(U1908225)
National Natural Science Foundation of China(52174333)
出版年
2023
NETL
NSTL
万方数据