Low‐Temperature Synthesis of Nanocrystalline NbB2 Powders by Borothermal Reduction in Molten Salt |
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| Authors: | Songlin Ran Huifeng Sun Ya'nan Wei Dewen Wang Niming Zhou Qing Huang |
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| Affiliation: | 1. Anhui Key Lab of Metal Materials and Processing, School of Materials Science and Engineering, Anhui University of Technology, , Ma'anshan, 243002 China;2. Engineering Research Center of Nano‐Geo Materials of Ministry of Education, China University of Geosciences, , Wuhan, 430071 China;3. Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, , Ningbo, 315201 China |
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| Abstract: | Nanocrystalline NbB2 powders were successfully prepared by borothermal reduction in molten salt at 800°C–1000°C. Due to the more homogeneous mixing and more rapid diffusion of species in the liquid state than in the solid state, the synthesis temperature of pure NbB2 phase was greatly decreased by the presence of molten NaCl/KCl salt. The NbB2 powders synthesized at 1000°C had the largest specific surface area of 27.09 m2/g and the lowest equivalent average particle size of 32 nm, respectively. |
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