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Effect of Si3N4 powder reactivity on the preparation of the Si2N2O-Al2O3 silicon aluminum oxynitride solid solutionDense high-purity silicon aluminum oxynitride was prepared by reactive hot-pressing of an Si3N4-Al2O3-SiO2 mixture. The formation of a single-phase material was found to be critically dependent on the Si3N4 powder in the starting mixture. It is suggested that evolution of a chlorine- and nitrogen-containing species may enhance the reactivity of Si3N4 in this reaction. Densities of O prime sialons are very similar to that of Si2N2O, the widely quoted value in the ceramics literature of 3.1 g/cu cm for the density of Si2N2O being incorrect.
Document ID
19800044391
Document Type
Reprint (Version printed in journal)
Authors
Sekercioglu, I. (Battelle Columbus Labs. OH, United States)
Wills, R. R. (Battelle Columbus Laboratories Columbus, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1979
Publication Information
Publication: American Ceramic Society
Subject Category
NONMETALLIC MATERIALS
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other