Reactivity in the Al2O3-AlN-MgO system. The MgAlON spinel phase

The conditions for obtaining spinel aluminium and magnesium oxynitride were examined in the temperature range 1400-1850 C into the domain delimited by the spinel solid solutions: MgAl2O4-Al2O3 and AlON-Al2O3. The study of some compositions having the same ratio N/Mg = 0.35 elaborated in different sy...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 1994, Vol.13 (4), p.365-370
Main Authors: GRANON, A, GOEURIOT, P, THEVENOT, F, GUYADER, J, L'HARIDON, P, LAURENT, Y
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Liquid-solid equilibria
Phase equilibria
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Summary:The conditions for obtaining spinel aluminium and magnesium oxynitride were examined in the temperature range 1400-1850 C into the domain delimited by the spinel solid solutions: MgAl2O4-Al2O3 and AlON-Al2O3. The study of some compositions having the same ratio N/Mg = 0.35 elaborated in different systems: AlN-MgAl2O4, AlN-MgO, AlON-MgO showed the presence of intermediate spinels in which aluminium nitride or magnesium oxide are dissolved when the temperature increases, giving the MgAlON spinel. Some secondary reactions are observed under specific conditions. The lattice parameter evolution in regard to the composition was also studied. 14 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/0955-2219(94)90012-4