Electrochemical behavior of tungsten in（NaCl–KCl–NaF–WO3 ） molten salt
来源期刊：Rare Metals2013年第5期
论文作者：Jie Li Xin-Yu Zhang Ya-Bin Liu Yun-Gang Li Ri-Ping Liu
文章页码：512 - 517
摘 要：The electrochemical reaction mechanism and electrocrystallization process of tungsten in the NaCl–KCl–NaF–WO3molten salt were investigated at 973 K（700°C）by means of cyclic voltammetry,chronopotentiometry,and chronoamperometry techniques.The results show that the electrochemical reaction process of tungsten in the NaCl–KCl–NaF–WO3molten salt system is a quasireversible process mix-controlled by ion diffusion rate and electron transport rate.Tungsten ion in this system is reduced to W（0）in two steps.The electrocrystallization process of tungsten is found to be an instantaneous,hemispheroid three-dimensional nucleation process and the tungsten ion diffusion coefficient of 2.361 9 10-4cm2s-1is obtained at experimental conditions.
Jie Li1,2，Xin-Yu Zhang1，Ya-Bin Liu2，Yun-Gang Li2，Ri-Ping Liu1
1. Key Laboratory of Metastable Materials Science & Technology, Yanshan University2. Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, College of Metallurgy & Energy, Hebei United University
摘 要：The electrochemical reaction mechanism and electrocrystallization process of tungsten in the NaCl–KCl–NaF–WO3molten salt were investigated at 973 K（700°C）by means of cyclic voltammetry,chronopotentiometry,and chronoamperometry techniques.The results show that the electrochemical reaction process of tungsten in the NaCl–KCl–NaF–WO3molten salt system is a quasireversible process mix-controlled by ion diffusion rate and electron transport rate.Tungsten ion in this system is reduced to W（0）in two steps.The electrocrystallization process of tungsten is found to be an instantaneous,hemispheroid three-dimensional nucleation process and the tungsten ion diffusion coefficient of 2.361 9 10-4cm2s-1is obtained at experimental conditions.
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