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| tungsten oxide; hydrogen reduction; blue tungsten; purple tungsten; ultrafine tungsten powder |
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Received:December 26, 2017
Revised:December 28, 2017
Accepted:January 02, 2018
Published Online:May 17, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.06.015 |
| KeyWord:tungsten oxide; hydrogen reduction mechanism; blue tungsten; purple tungsten; ultrafine tungsten powder |
| Author | Institution |
| Chen Lijie |
冶金与化学工程学院 |
| Tian Lei |
冶金与化学工程学院 |
| Xu Zhifeng |
冶金与化学工程学院 |
| Xie Zhonghua |
冶金与化学工程学院 |
| Nie Huaping |
江西理工大学 |
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| Hits: 1902 |
| Download times: 1943 |
| Abstract: |
| Effects of tungsten oxide powders with different oxygen contents on preparation of ultrafine tungsten powders were studied. The results show that tungsten powder particle size prepared with blue tungsten (WO2.90) as raw material is about 1 μm, which is bigger than that with purple tungsten (WO2.72) as raw material. The experimental results of preparation of ultrafine tungsten powder with different oxygen content of tungsten oxide powder shows that the effecting sequence on particle size of FSSS is reduction temperature, H2 flow rate, loading amount of boat, and boat moving speed. Particle size of tungsten powder is about 0.3 μm prepared from violet tungsten under the conditions including reduction temperature of 700~840 ℃, boat moving speed of 18 min/boat, loading amount of boat of 0.35 kg/boat, and hydrogen flow rate of 50~60 m3/h. |
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