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Low‐Temperature Synthesis of Nanocrystalline NbB 2 Powders by Borothermal Reduction in Molten Salt
Author(s) -
Ran Songlin,
Sun Huifeng,
Wei Ya'nan,
Wang Dewen,
Zhou Niming,
Huang Qing
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13298
Subject(s) - nanocrystalline material , molten salt , materials science , homogeneous , chemical engineering , mixing (physics) , diffusion , phase (matter) , salt (chemistry) , metallurgy , chemistry , mineralogy , thermodynamics , nanotechnology , organic chemistry , physics , quantum mechanics , engineering
Nanocrystalline NbB 2 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 NbB 2 phase was greatly decreased by the presence of molten NaCl / KCl salt. The NbB 2 powders synthesized at 1000°C had the largest specific surface area of 27.09 m 2 /g and the lowest equivalent average particle size of 32 nm, respectively.