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Synthesis and Sintering of Aluminium Nitride Nano-particles

Published online by Cambridge University Press:  01 February 2011

Zhao HAN ,
Mei YANG  and
Hongmin ZHU
Zhao HAN
Affiliation:
[email protected], University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, 30 Xueyuan Rd., Beijing, Beijing, 100083, China, People's Republic of
Mei YANG
Affiliation:
[email protected], University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Beijing, 100083, China, People's Republic of
Hongmin ZHU
Affiliation:
[email protected], University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Beijing, 100083, China, People's Republic of
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Abstract

Aluminum nitride (AlN) nano-particles were synthesized from aluminum chloride by sodium reduction in liquid ammonia. A liquid solution of sodium dissolved in ammonia was employed as a reduction-nitridation agent, which enabled direct nitridation of aluminum chloride at −45°C. The synthesized particles were heat-treated at 1000°C in vacuum, and were characterized by X-ray diffraction (XRD), scan electron microscopy (SEM), transmission electron microscopy (TEM) and BET surface area measurement. The results indicated that the product were hexagonal wurtzite AlN particles, with a specific surface area of 262 m2g−1. Spark plasma sintering (SPS) process was used to consolidate the as-prepared AlN nanoparticles, and a dense AlN ceramic (>98.5%) with average grain size of 200-400nm was obtained at 1600°C without the use of sintering additives.

Keywords

nanoscaleparticulateceramic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1040: Symposium Q – Nitrides and Related Bulk Materials , 2007 , 1040-Q09-21
Copyright
Copyright © Materials Research Society 2008

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