Nitridation of delta-alumina to aluminum nitride under a flow of ammonia and its mechanism

Title
Nitridation of delta-alumina to aluminum nitride under a flow of ammonia and its mechanism
Author(s)
정우식김준광
Keywords
CARBOTHERMAL REDUCTION; ALN
Issue Date
201105
Publisher
CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI
Citation
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, v.119, no.1389, pp.351 - 354
Abstract
Nanosized delta-alumina (delta-Al2O3) powders were calcined at various temperatures under a flow of ammonia (NH3) passing over a carbon black-containing crucible. The nitridation process of delta-Al2O3 to aluminum nitride (AlN) was monitored by powder X-ray diffraction, infrared (IR) spectroscopy, and Al-27 magic-angle spinning nuclear magnetic resonance spectroscopy. delta-Al2O3 began to be converted to AlN at 1150 degrees C without delta-alpha alumina transformation and the conversion was completed at 1300 degrees C for 5 h. The IR spectra of the gases evolved during the nitridation revealed the inclusion of NH3, CH4, HCN, and CO gases. Results on the calcination of delta-Al2O3 under a flow of acetonitrile diluted in argon indicated that HCN is involved in the nitridation reaction of delta-Al2O3. (C) 2011 The Ceramic Society of Japan. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/25219http://dx.doi.org/10.2109/jcersj2.119.351
ISSN
1882-0743
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공과대학 > 화학공학부 > Articles
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