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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Synthesis and characterization of tantalum nitride nanopowder prepared through homogeneous reaction
MA Chun-hong(马春红)1, 2, ZHANG Wei-feng(张威峰)1, HE Ji-lin(何季麟)2, ZHU Hong-min(朱鸿民)1

1. School of Metallurgical and Ecological Engineering,
University of Science and Technology Beijing, Beijing 100083, China;
2. Ningxia Orient Tantalum Industry Ltd., Shizuishan 753000, China

Abstract:Tantalum nitride powders with particle size of 20−50 nm were prepared by the homogeneous reduction in liquid ammonia, and were treated at the temperature range from 500 ℃ to 1 170 ℃. The results of XRD analysis indicate that the powders heated up to 500 ℃ are in the form of amorphous. The powder heated at 600 ℃ tends to transform into crystal, the powder heated to temperatures higher than 700 ℃ is clearly of crystal. The results of surface area analysis by BET show that the surface area of the powder increases as the heating temperature increases, and reaches a maximum value of 21.8 m2/g at the heating temperature around 700 ℃.

 

Key words: homogeneous reduction; tantalum nano powder; BET surface area analysis

ISSN 1672-7029
CN 43-1423/U

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