Low-Temperature Synthesis of Nanocrystalline NbB2 Powders by Borothermal Reduction in Molten Salt
Low-Temperature Synthesis of Nanocrystalline NbB2 Powders by Borothermal Reduction in Molten Salt
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DOI：
10.1111/jace.13298
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发表时间：
2014-11
影响因子：
3.9
通讯作者：
S. Ran;Huifeng Sun;Wei Yanan;Dewen Wang;Niming Zhou;Qing Huang
中科院分区：
文献类型：
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作者：
S. Ran;Huifeng Sun;Wei Yanan;Dewen Wang;Niming Zhou;Qing Huang
在800 ℃ ~ 1000 ℃的熔盐中用硼氢化物还原法成功地制备了NbB_2纳米晶粉末。由于更均匀的混合和更快速的物种在液体状态下比在固体状态下的扩散，纯NbB 2相的合成温度大大降低了熔融NaCl/KCl盐的存在下。在1000 ℃下合成的NbB_2粉体比表面积最大，为27.09m（2）/g，当量平均粒径最小，为32 nm。
Nanocrystalline NbB2 powders were successfully prepared by borothermal reduction in molten salt at 800 degrees C-1000 degrees 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 degrees C had the largest specific surface area of 27.09m(2)/g and the lowest equivalent average particle size of 32nm, respectively.