Al-27 MAS NMR spectroscopic identification of reaction intermediates in the carbothermal reduction and nitridation of alumina

Title
Al-27 MAS NMR spectroscopic identification of reaction intermediates in the carbothermal reduction and nitridation of alumina
Author(s)
정우식채신애[채신애]
Keywords
MECHANISM; WHISKERS; MIXTURE; POWDER
Issue Date
201010
Publisher
ELSEVIER SCIENCE SA
Citation
MATERIALS CHEMISTRY AND PHYSICS, v.123, no.2-3, pp.610 - 613
Abstract
The reaction intermediates in the carbothermal reduction and nitridation (CRN) reaction of gamma-Al2O3 were identified by Al-27 magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. This identification ruled out the possibility of a reaction mechanism involving the gaseous reaction intermediates. In the CRN reaction of gamma-Al2O3, AlO4 units were converted to AlN stepwise via AlNxO4-x (x = 1, 2, 3) intermediates, while AlO6 units were more slowly converted to AlN than AlO4 units and the NMR peaks of partially nitridated AlO6 units were not detected. The NMR peak intensities of partially nitridated AlO4 units became weaker with increasing reaction temperature. (C) 2010 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/23498http://dx.doi.org/10.1016/j.matchemphys.2010.05.023
ISSN
0254-0584
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공과대학 > 화학공학부 > Articles
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