摘要
结合碘化法与电子束熔炼法制备了纯度≥4N5的高纯Ti。碘化法是利用粗Ti在卤化区（温度为800-900K）的产物TiI4与粗Ti反应生成TiI2,同时在1 200-1 400K温度下使TiI2发生裂解反应。通过SEM、EDS、GDMS方法对制得的样品进行表面形貌、微区化学成分和杂质元素含量的分析。经过实验及热力学分析,确定了卤化区与裂解区的温度及杂质Cr、Ni存在的原因,为今后控制金属杂质含量,优化实验条件提供了理论依据。
Titanium with the purity higher than 4N5 was prepared with iodination method and electron-beam smelting method.During iodination,TiI4 was produced in 800-900Khalogenation area from crude titanium,then TiI4 reacted with crude titanium to synthesize TiI2,and meanwhile TiI2 decomposed at 1 200-1400K.Surface morphology,micro-area chemical composition and impurity content of the samples were analyzed by SEM,EDS and GDMS,respectively.Based on experiments and thermodynamic analysis,the temperatures in halogenation area and decomposition area and the reason for existence of Cr and Ni impurities are determined to provide a theoretical basis for the future control of metal impurity content and experimental condition optimization.
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2016年第1期9-14,共6页
Rare Metals and Cemented Carbides
关键词
高纯Ti
碘化法
金属杂质
热力学
CR
NI
high-purity titanium
iodination method
metal impurity
thermodynamics
Cr
Ni
