Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt

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	Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt
	D. D. Tang; W. Xiao; H. Y. Yin; L. F. Tian; D. H. Wang
	2012
发表期刊	Journal of the Electrochemical Society
ISSN	0013-4651
卷号	159 期号:6 页码:E139-E143
摘要	Direct electrochemical reduction of solid CaWO4 to fine W powder in molten CaCl2-NaCl was studied by cyclic voltammetric measurement and potentiostatic/constant-voltage electrolysis. The effect of electrolysis conditions such as electrolysis time, temperature and voltage on the quality of the product (the residual amount of CaWO4) was systematically investigated. Based on the solubility tests of CaWO4 in the melt in a wide temperature range, an unprecedented strategy on electrolytic extraction of pure tungsten powder was proposed and confirmed, which involves low-temperature and short-duration electrolysis of solid CaWO4 in molten CaCl2-NaCl eutectic salt (1023 K, 10-hour electrolysis) followed by a simple washing process in the same melt at a higher temperature (1123 K, 1-hour washing). The particle size of the as-prepared W powder is less than 200 nm. This process exhibits a high yield and increased energy efficiency for production of fine W powder from CaWO4. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.113206jes] All rights reserved.
部门归属	[tang, dingding; xiao, wei; yin, huayi; tian, longfei; wang, dihua] wuhan univ, sch resource & environm sci, wuhan 430072, peoples r china. [wang, dihua] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;tang, dd (reprint author), wuhan univ, sch resource & environm sci, wuhan 430072, peoples r china.;wangdh@whu.edu.cn
关键词	3-phase Interlines Electrochemical Reduction Insulator Compounds Electroreduction Precursors Titanium Driven Cacl2 Oxide Model
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60256
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. D. Tang,W. Xiao,H. Y. Yin,et al. Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt[J]. Journal of the Electrochemical Society,2012,159(6):E139-E143.
APA	D. D. Tang,W. Xiao,H. Y. Yin,L. F. Tian,&D. H. Wang.(2012).Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt.Journal of the Electrochemical Society,159(6),E139-E143.
MLA	D. D. Tang,et al."Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt".Journal of the Electrochemical Society 159.6(2012):E139-E143.