摘要
采用熔盐电脱氧法,在CaCl2熔盐中,以烧结的掺杂了不同摩尔分数CaCO3的ZrO2为阴极,石墨棒为阳极,制备出了金属锆。研究了掺杂物及其掺杂量对阴极的形貌和电解反应的影响。结果表明:掺杂物CaCO3提高了ZrO2电解脱氧的速度。其原因是在反应过程中,制备阴极时CaCO3分解生成的CaO溶解在熔盐中,在阴极内部形成更多的反应界面,提高了阴极的电化学反应活性,加快电解反应的进行,从而提高了电流效率,缩短了熔盐电脱氧制备金属锆的时间。
Metal zirconium was prepared by electro-deoxidization method, using CaCl2 molten as electrolyte, sintered ZrO2 and ZrO2 doped with different mole fraction CaCO3 pallets as cathode, and graphite rod as anode, The pallets were electrolyzed at 900 ℃ under 3.1 V for 8 h. It was found that adding of CaCO3 impacted the morphology of ZrO, and the rate of electro-deoxidization reaction was increased. The reason is that the addition increases the oxygen in ZrO2 crystal and surface area of the sintered ZrO2 particles.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A04期537-541,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金重点项目(50434030)
国家重点基础研究发展计划"973"计划(2007CB613801)
