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Journal of Materials Science

, Volume 32, Issue 4, pp 979–982 | Cite as

The formation and stability of γ-aluminium oxynitride spinel in the carbothermal reduction and reaction sintering processes

  • LI YAWEI
  • LI NAN
  • YUAN RUNZHANG
Article

Abstract

Several methods of manufacturing γ-aluminium oxynitride spinel (ALON) powder are discussed in this paper. In the carbothermal reduction process, ALON is an intermediate compound, and powders with a high ALON content may be produced in flowing nitrogen below 1650 °C if process parameters are carefully controlled. In addition, ALON may be produced when Al2O3/C mixtures are heated in a coke powder bed above 1650 °C. In the reaction sintering process, ALON is unlikely to form below 1600 °C in a flowing nitrogen atmosphere or in a coke powder bed, owing to the instability of ALON and the fact that the solid–solid reaction does not readily occur unless additives, e.g. MgO, MgAl2O4, are employed.

Keywords

Intermediate Compound Carbothermal Reduction Reaction Sinter Carbon Black Powder Coke Powder 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • LI YAWEI
    • 1
  • LI NAN
    • 1
  • YUAN RUNZHANG
    • 2
  1. 1.School of Materials Science and EngineeringWuhan Yejin University of Science and TechnologyPeople’s Republic of China
  2. 2.Institute of Advanced MaterialsWuhan University of TechnologyPeople’s Republic of China

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