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Journal of Materials Science

, Volume 26, Issue 6, pp 1585–1587 | Cite as

Nitrogen-containing aluminium titanate

  • D. S. Perera
  • M. E. Bowden
Papers

Abstract

In the Ti-Al-O-N system a phase isostructural to aluminium titanate but with expanded unit cell dimensions was observed. It was stable between 1400 and 1700 °C and has unit cell dimensions of a=0.3719 nm, b=0.9703 nm and c=0.9869 nm with a composition of Ti 1.00 4+ Al 0.54 3+ Ti 1.46 3+ N 0.28 3− O 4.58 2− 0.14 Several samples were prepared by reaction sintering mixtures of TiN, Al2O3 and AlN powders at 1400 to 1470 °C for 4 h in a nitrogen atmosphere to maximize this phase. One specific advantage of the nitrogen-containing aluminium titanate over aluminium titanate is that the former is unchanged at 1150 °C in a nitrogen atmosphere whereas the latter decomposes. In the Al2O3-TiO2 oxide system Al2TiO5 solid solution extends to approximately Al0.75Ti2.25O5 at 1470 °C under the mildly reducing conditions of a graphite furnace. The unit cell volume increases linearly with the increasing replacement of Al3+ by Ti3+.

Keywords

Oxide Polymer Furnace Graphite Al2O3 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    D. S. Perera, submitted to Brit. Ceram. Soc. Trans. & J. 89 (1990) 57.Google Scholar
  2. 2.
    A. Mocellin and G. Bayer, J. Mater. Sci. 20 (1985) 3697.CrossRefGoogle Scholar
  3. 3.
    G. Åsbrink and A. Magneli, Acta Chem. Scand. 21 (1967) 1977.CrossRefGoogle Scholar
  4. 4.
    D. Goldberg, Rev. Int. Hautes Temp. Refract. 5 (1968) 181.Google Scholar
  5. 5.
    R. D. Shannon, Acta Crystallogr. A32 (1976) 751.CrossRefGoogle Scholar
  6. 6.
    Powder Diffraction File, Card No. 26–40, Joint Committee on Powder Diffraction Standards, Swarthmore, USA.Google Scholar
  7. 7.
    K. Schwarz and A. Neckel, in 2nd Int. Conf. Science Hard Mater. Rhodes, September 1984 (Inst. Phys. Conf. Ser. 75) edited by E. A. Almond and R. Warren (Adam Hilger, Bristol, 1986) p. 45.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1991

Authors and Affiliations

  • D. S. Perera
    • 1
  • M. E. Bowden
    • 1
  1. 1.Chemistry DivisionDSIRPetoneNew Zealand

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