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《Rare Metal Materials and Engineering》 2001-04
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Preparation of Tungsten Powder by SHS with Reduction Process

Wang Yanling 1,2, Zhang Tingan 2, Yang Huan2, Wei Shicheng2(1. Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China) (2. Northeastern University, Shenyang 110006, China)  
Self-propagating high-temperature synthesis(SHS) with reduction process was used to fabricate tungsten powder from the system CaWO_4-Mg. The physico-chemical change during heating and the effects of pressure of sample and diluent on product have been studied. The experimental results show that with increasing pressure of sample, the porosity of combustion product and the particle size of final tungsten powder decrease. Additive diluent could increase the particle size of final tungsten powder. The purity of tungsten is improved by leaching in NaOH solution. The results of spectral analysis and particle size distribution of final tungsten powder show that the final W powder has median diameter of 087 μm, Specific surface area of 109 m2/g and purity of above 990%.
【CateGory Index】: TF124
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