Low-Temperature Synthesis of VB{sub 2} Nanopowders by a Molten-Salt-Assisted Borothermal Reduction Process
- University of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy (China)
Vanadium diboride (VB{sub 2}) powders with low oxygen content are prepared via a molten-salt-assisted borothermal reduction reaction at 1123 K to 1273 K (850 °C to 1000 °C) using V{sub 2}O{sub 3} and boron powders as the raw materials. The effects of the amount of molten salt and reaction temperature on the phase transition and morphology of the final products are investigated. The results reveal that the addition of molten salt is beneficial for decreasing both the synthesis temperature and particle size of the final products. When the mass ratio of NaCl to reactants is 0.75:1, the VB{sub 2} powders prepared at 1173 K (900 °C) have a particle size lower than 100 nm. Too little or too high molten salt addition has a negative impact on the preparation of the VB{sub 2} powders. Furthermore, the reaction temperature has an important impact on the morphology and purity of the VB{sub 2} particles. An appropriate reaction temperature (1173 K (900 °C)) is beneficial for controlling the size of the VB{sub 2} particles in the order of nanoscale and improving the quality of the VB{sub 2} powders.
- OSTI ID:
- 22933518
- Journal Information:
- Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Vol. 50, Issue 4; Other Information: Copyright (c) 2019 The Minerals, Metals & Materials Society and ASM International; Country of input: International Atomic Energy Agency (IAEA); ISSN 1073-5615
- Country of Publication:
- United States
- Language:
- English
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