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Titanium nitride nanopowders produced via sodium reductionin liquid ammonia

Published online by Cambridge University Press:  31 January 2011

Boyan Yuan ,
Mei Yang  and
Hongmin Zhu
Hongmin Zhu*
Affiliation:
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
*
a) Address all correspondence to this author. e-mail: hzhu@metall.ustb.edu.cn
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Abstract

Titanium nitride nanopowders were synthesized through a chemical reduction of titanium tetrachloride by sodium in liquid ammonia. The products of the reaction were the mixture of sodium chloride and titanium nitride nanopowders. The mixture was then separated by ammonia extraction. The nanopowders were heated under vacuum up to 1200 °C and were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmet-Teller (BET) surface area measurement, and chemical analysis. The results show that the product is nanocrystalline cubic phase TiN with Ti/N atomic ratio performed 1:1, and the surface area is from 20 to 50 m2 ·g−1 depending on the heating temperature. The particle sizes estimated by the TEM analysis correspond well with the results of the surface area measurements. The XRD pattern indicates that the crystal size grows with an increase in heating temperature.

Keywords

NanoscaleNitrideTi
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 2 , February 2009 , pp. 448 - 451
Copyright
Copyright © Materials Research Society 2009

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