Effect of carbon monoxide on the carbothermal reduction and nitridation reaction of alumina

  • Joo H
  • Jung W
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The carbothermal reduction and nitridation (CRN) of alumina (Al2O3) to aluminum nitride (AlN) were investigated under a flow of mixed gas of nitrogen and carbon monoxide (CO). The powders obtained by calcining the (hydroxo)(succinato)Al(III) complex under a flow of the mixed gas with different CO contents were characterized by powder XRD and27Al magic-angle spinning (MAS) NMR spectroscopy. The complex decomposed into ρ-Al2O3, which was then converted into either AlN or δ-Al2O3through γ-Al2O3, depending on the CO content in the mixed gas. The CRN reaction of Al2O3became more retarded with increasing content of CO in the mixed gas. © 2008 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • 27Al MAS NMR
  • AlN
  • Carbon monoxide
  • Carbothermal reduction
  • Retardation

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  • Hyeong Uk Joo

  • Woo Sik Jung

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