Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt
Production of Fine Tungsten Powder by Electrolytic Reduction of Solid CaWO4 in Molten Salt
复制标题
熔盐中电解还原固体CaWO4生产细钨粉
DOI:
10.1149/2.113206jes
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发表时间:
2012
影响因子:
3.9
通讯作者:
Wang, Dihua
中科院分区:
文献类型:
--
作者:
Tang, Dingding;Xiao, Wei;Yin, Huayi;Tian, Longfei;Wang, Dihua
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.
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DOI:
10.1002/cphc.200600149
发表时间:
2006-08
期刊:
Chemphyschem : a European journal of chemical physics and physical chemistry
影响因子:
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作者:
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通讯作者:
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1999
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通讯作者:
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1969-07
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Zeitschrift für anorganische und allgemeine Chemie
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通讯作者:
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1979
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作者:
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通讯作者:
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影响因子:
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