Preparation of La2O3 doped ultra-fine W powders by hydrothermal-hydrogen reduction process
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Abstract
Abstract In the present study, hydrothermal-hydrogen reduction process as a novel wet-chemical route was performed for the preparation of La2O3 doped ultra-fine W powders. WO3 precursor powders with nanorods were fabricated by the hydrothermal reaction of sodium tungstate, citric acid and sodium sulfate in aqueous solutions in autoclave, and then were reduced by high purity hydrogen to obtain doped tungsten powders. Reaction time and PH value of solution affected morphology of WO3 precursor powders and following doped tungsten powders. TEM results revealed that the obtained La2O3 doped W powders presented good sphericity with particle size of about 700 nm and narrow particle size distribution, which was determined mainly by the diameter of rod-like WO3 due to in-situ hydrogen reduction mechanism.
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References (22)
Show source-provided references
1. Development of a helium-cooled divertor concept: design-related requirements on materials and fabrication technology10.1016/j.jnucmat.2004.04.137 ↗
2. An overview of safety and environmental considerations in the selection of materials for fusion facilities10.1016/S0022-3115(96)00302-9 ↗
3. A survey of plasma facing materials for fusion power plants10.1179/174328406X111110 ↗
4. Assessment of tungsten for use in the ITER plasma facing components10.1016/S0022-3115(98)00285-2 ↗
5. Development of tungsten armor and bonding to copper for plasma-interactive components10.1016/S0022-3115(98)00358-4 ↗
6. Kitsunai · J Nucl Mater · 1999 · 271–272 · 42310.1016/S0022-3115(98)00753-3 ↗
7. Ishijima · J Nucl Mater · 2004 · 329–333 · 77510.1016/j.jnucmat.2004.04.306 ↗
8. Effect of recrystallization on the fracture toughness of tungsten10.1007/BF00795612 ↗
9. Effect of rhenium addition on fracture toughness of tungsten at elevated temperatures10.1007/BF00356341 ↗
10. Tensile properties at elevated temperature of W-1%La2O310.1016/0921-5093(96)10377-4 ↗
11. Deformation behavior and strengthening mechanisms at intermediate temperatures in W-La2O310.1016/S0921-5093(97)00420-6 ↗
12. Fabrication and properties of mechanically alloyed oxide-dispersed tungsten heavy alloys10.1016/S0921-5093(03)00641-5 ↗
13. High temperature tensile properties and their application to toughness enhancement in ultra-fine grained W-(0–1.5)wt% TiC10.1016/j.jnucmat.2008.12.181 ↗
14. High temperature tensile properties and their application to toughness enhancement in ultra-fine grained W-(0–1.5)wt% TiC10.1016/j.jnucmat.2008.12.217 ↗
15. The sintering behavior of nanosized tungsten powder prepared by a plasma process10.1016/j.ijrmhm.2008.11.004 ↗
16. Chemically produced nanostructured ODS–lanthanum oxide–tungsten composites sintered by spark plasma10.1016/j.jnucmat.2010.10.060 ↗
17. Novel synthesis of Al13-cluster based alumina materials10.1016/S0965-9773(99)00412-2 ↗
18. Spark plasma sintering of tungsten–yttrium oxide composites from chemically synthesized nanopowders and microstructural characterization10.1016/j.jnucmat.2011.03.007 ↗
19. Fabrication of nanostructured W-Y2O3 materials by chemical methods
20. Large-scale synthesis and gas sensing application of vertically aligned and double-sided tungsten oxide nanorod arrays10.1016/j.snb.2009.09.015 ↗
21. Characterization of h-WO3 nanorods synthesized by hydrothermal process10.1016/j.poly.2010.02.025 ↗
22. Preparation of ultrafine tungsten powders by in-situ hydrogen reduction of nano-needle violet tungsten oxide10.1016/j.ijrmhm.2011.05.002 ↗