摘要
以海绵钛作可溶阳极,纯钛板为阴极,NaCl-KCl-TiClx混合熔盐作电解质,在电解温度为900～980℃、阴极电流密度为0.1～0.6A/cm2、初始可溶钛浓度2%～8%的条件下,电解24h制备高纯钛粉,研究初始可溶钛浓度对钛粉中杂质元素含量的影响,以及电流密度和初始可溶钛浓度对电流效率及钛粉形貌的影响。结果表明,钛粉杂质含量完全达到高纯钛粉的标准,提高初始可溶钛浓度可降低杂质含量;在较高的阴极电流密度以及高的初始可溶钛浓度下电解效率较高;在阴极电流密度较高时钛粉为细小的树枝状晶体,而在阴极电流密度较低时得到较粗大均匀的结晶粉体。
High purity titanium powder was prepared by molten-salts electrolysis,using NaCl-KCl-TiClx mixed molten salts as electrolyte,titanium sponge as anode,titanium plate as cathode,electrolysis temperature of 900～980 ℃,current density of cathode of 0.1 A/cm2～0.6 A/cm2,initial soluble titanium concentration of 2%～8% and electrolysis time of 24 hours. Both the effect of initial soluble titanium concentration on impurity elements,and the effect of current density and initial soluble titanium concentration on morphology of titanium powder,have been studied. The experimental results show that the impurity elements content can meet the standard of high-purity titanium powder,the impurity elements content can be decreased by increasing initial titanium concentration,higher current density and initial titanium concentration can improve the current efficiency,and the titanium powder is smaller dendritical crystal at higher current density while it is bigger and uniform block crystal at lower current density.
出处
《粉末冶金材料科学与工程》
EI
2010年第1期70-73,共4页
Materials Science and Engineering of Powder Metallurgy
基金
国家杰出青年科学基金资助项目(50825102)
关键词
熔盐电解
高纯钛粉
电流密度
可溶钛浓度
molten-salts electrolysis
high-purity titanium powder
current density
soluble titanium concentration
