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
刊名	Journal of the Electrochemical Society
	2012
卷号	159 期号:6 页码:E139-E143
关键词	3-phase interlines electrochemical reduction insulator compounds electroreduction precursors titanium driven cacl2 oxide model
ISSN号	0013-4651
中文摘要	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.
原文出处	://WOS:000304140700061
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60256]
专题	金属研究所_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.