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Licensed Unlicensed Requires Authentication Published by De Gruyter April 12, 2014

Effects of Al2O3 phase composition on AlON powder synthesis via aluminothermic reduction and nitridation

  • Jianqi Qi , Ying Wang , Xiumin Xie , Yuezhong Wang , Jicheng Zhou , Nian Wei , Jun Wang , Di Wu and Tiecheng Lu

Abstract

Using micro-sized aluminum powder (11 wt.%) and nano-sized Al2O3 powder (89 wt.%) with five different phase compositions, AlON powders were synthesized at different temperatures in flowing-nitrogen atmosphere. Our results suggest that for starting materials with low γ-Al2O3/total Al2O3 ratio R (0 and 0.15), a calcination temperature of 1 750 °C is required to obtain single-phase AlON. This temperature is about 50 °C higher than for other batches starting with larger R values (0.5, 0.85, and 1.0). The AlON powders fabricated from reactants with a high R value in this work show narrower particle size distribution and better particle homogeneity than those prepared from batches with lower R values.


* Correspondence address, Prof. Jianqi Qi, or Prof. Tiecheng Lu, Department of Physics, Sichuan University, 29 Wangjiang Road, Wuhou District, Chengdu, 610064, P. R. China, Tel: +86-028-85412322, Fax: +86-028-85412322, E-mail: ,

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Received: 2013-06-04
Accepted: 2013-11-21
Published Online: 2014-04-12
Published in Print: 2014-04-14

© 2014, Carl Hanser Verlag, München

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