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Journal of Nanomaterials
Volume 2010 (2010), Article ID 540456, 6 pages
http://dx.doi.org/10.1155/2010/540456
Research Article

Synthesis of Boron Nitride Nanotubes by Self-Propagation High-Temperature Synthesis and Annealing Method

1School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China
2Nano and Ceramic Materials Research Center, Wuhan Institute of Technology, Wuhan 430073, China

Received 30 September 2010; Accepted 29 December 2010

Academic Editor: Edward Andrew Payzant

Copyright © 2010 Jilin Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

High-quality boron nitride nanotubes were synthesized by annealing porous precursor in flowing NH3 gas at 1150°C. The porous precursor B18Ca2(MgO)9 was produced by self-propagation high-temperature synthesis (SHS) method using Mg, B2O3, and CaB6 as the starting materials, which played an important role in synthesis of BN nanotubes in large quantities. Samples were characterized by SEM, TEM, EDX, HRTEM, X-ray powder diffraction (XRD), Raman, and Fourier transform infrared (FTIR) spectroscopy. The as-synthesized BN nanotubes have an average diameter of about 150 nm with a wall/diameter ratio of 2/3. Mean length of the BN nanotubes was more than 10 μm. The effects of temperature, time, and the possible mechanism of the growth of the BN nanotubes were also discussed.