阴极掺杂提高熔盐电脱氧制备锆电解效率的机制

Mechanism on Increasing Electroanalysis Efficiency by Cathode Doping for the Metal Zirconium Prepared by Electro-Deoxidization in Molten Salt

摘要:

采用熔盐电脱氧法，在CaCl2熔盐中，以烧结的方式掺杂不同摩尔分数CaCO3粉末的ZrO2为阴极，石墨棒为阳极，温度为900 ℃，电压为3.1 V, 制备出锆。研究掺杂物及其浓度对阴极的形貌、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；掺杂还增加电脱氧的有效反应面积，使电流效率提高，有效地缩短电脱氧所需的时间

Abstract:

Metal zirconium was prepared by electro-deoxidization method by using CaCl2 molten as electrolyte, sintered ZrO2 and ZrO2 doped different mole CaCO3 pallets as cathode, graphite rod as anode. The pallets were electrolyzed at 900 ℃ and 3.1 V for 8 h. It is found that the rate of electro-deoxidization reaction for ZrO2 and the current efficiency were increased, and the reaction time of Electro-deoxidization was shortened by adding CaCO3.