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TitleA new, low-temperature polymorph of O′-SiAlON
Publication TypeJournal Article
Year of Publication1998
AuthorsBowden, M.E., Barris G.C., Brown I.W.M., and Jefferson D.A.
JournalJournal of the American Ceramic Society
Pagination2188 - 2190
Date Published1998
ISSN00027820 (ISSN)
KeywordsCeramic materials, Nitrides, Phase transitions, Polymorphs, Silicon compounds, Synthesis (chemical), Thermal effects
AbstractA new phase in the Si-Al-O-N system has been identified, following syntheses based on the nitridation of silicon/clay mixtures at low temperatures (<1350°C). The structure of the new phase was determined using a combination of diffraction and high-resolution imaging techniques, and this new phase possessed the same sheet structure as O′-SiAlON (Si2-xAlxO1+xN2-x) but with a different stacking arrangement. It is considered to be a low-temperature polymorph of O′-SiAlON and transforms to conventional O′-SiAlON at temperatures greater than ∼1350°C.

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