熔盐电脱氧制备金属铌的研究

来源期刊：上海金属2011年第2期

论文作者：谢大海 王兴庆 陈发允

文章页码：23 - 27

关键词：熔盐电脱氧制备； 金属铌； Nb₂O₅； 压制烧结

Key words：Electro-Deoxidation Preparation； Metals Niobium； Compacting and Sintering of Nb₂O₅

摘    要：采用熔盐电脱氧法,以熔融的CaCl₂-NaCl为电解质,经粉末压制烧结后的Nb2O5为阴极,石墨为阳极,电解制备了金属铌。并研究了压制压力、烧结温度、电解时间等因素对Nb2O5阴极电脱氧的影响。实验分析表明:阴极脱氧过程是由Nb₂O₅→NbO₂→NbO→Nb且由阴极表面到内部逐步进行的,在适宜条件下可以得到纯度为99.5%以上的金属铌。

Abstract: The electro-deoxidation process was used to reduce the metal niobium from Nb₂O₅ in CaCl₂-NaCl salt melt.The cathode in the process was the compacted and sintered solid Nb₂O₅,and the graphite worked as the anode.The influence of compact pressure,sintering temperature and electrolysis time on deoxidation behavior of Nb₂O₅ cathode was investigated.The experiment results indicated that deoxidation process of the cathode complied with the sequence of Nb₂O₅→NbO₂→NbO→Nb,and the process was conducted step by step from the surface to the core of cathode.The niobium with the purity of over 99.5% could be obtained under a suitable condition.