Abstract
OUR previous report1 on Si–Al–O–N ceramics stated that expanded α-silicon ‘nitride’ structures had been obtained by reaction of lithium–silicon nitride, LiSi2N3, with alumina. The unit-cell dimensions of one example (a, 7.822; c, 5.677Å) gave a cell volume about 3% greater than that of α-silicon nitride. Subsequent work2 showed a variation in dimensions for the α′-lithium sialon when lithium aluminate, LiAlO2, was reacted in different proportions with Si3N4. However, other phases, such as β′-sialon and nitrogen–eucryptite, were always present and the product never contained more than ∼30% of the α′ material. αν-Sialons were also found in the Mg–Si–Al–O–N system3 but again never pure, and were observed by Masaki et al.4 during the nitriding of silicon with A1N and A12O3 additions. A recent claim by Mitomo5 of α′ solid solutions of Si3N4–Al2O3 and/or Si3N4–Y2O3 occurring during the sintering of Si3N4 at 1,700–1,800 °C with Al2O3–Y2O3 mixtures prompted this report of the preparation and characterisation of pure α′-phases in M–Si–Al–O–N systems where M is Li, Ca or Y. Such phases also occur, but have not so far been prepared in a pure form, in magnesium and other sialon systems.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Jack, K. H. & Wilson, W. I. Nature phys. Sci. 238, 28 (1972).
Jama, S. A. B., Thompson, D. P. & Jack, K. H. Special Ceramics 6 (ed. Popper, P.) 299 (BCRA, Stoke-on-Trent, 1975).
Jack, K. H. J. materials Sci. 11, 1135 (1976).
Masaki, H., Oyama, Y. & Kamigaito, O. Jap. J. appl. Phys. 14, 301 (1975).
Mitomo, M. Yogyo-Kyokai-Shi 85, 50 (1977).
Wild, S., Grieveson, P. & Jack, K. H. Special Ceramics 5 (ed. Popper, P.) 385 (BCRA, Stoke-on-Trent, 1972).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
HAMPSHIRE, S., PARK, H., THOMPSON, D. et al. α′-Sialon ceramics. Nature 274, 880–882 (1978). https://doi.org/10.1038/274880a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/274880a0
This article is cited by
-
Enhancement of optical properties of Lu3Al5O12:Ce3+ and Ca-α-SiAlON:Eu2+ by quinine sulphate
Journal of Materials Science: Materials in Electronics (2021)
-
Electronic structure, thermodynamic stability and high-temperature sensing properties of Er-α-SiAlON ceramics
Scientific Reports (2020)
-
Luminescence properties of nitrogen-rich Ca-SiAlON:Eu2+ phosphors prepared by freeze-drying assisted combustion synthesis
International Journal of Minerals, Metallurgy and Materials (2020)
-
Spark plasma-sintered MoSi2-reinforced Y−α−SiAlON ceramics: mechanical and high temperature tribological properties
Journal of the Australian Ceramic Society (2020)
-
Development of calcium stabilized nitrogen rich α-sialon ceramics along the Si3N4:1/2Ca3N2:3AlN line using spark plasma sintering
Journal of Advanced Ceramics (2020)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.