Transparent aluminum oxynitride-based ceramic article
AssigneeMinnesota Mining and Manufacturing Company
InventorsJames P. Mathers, Robert G. Frey
Life of this patent
Estimating the term…
Abstract
This invention provides a transparent aluminum magnesium oxynitride ceramic, wherein greater than 0.5 weight percent of the total ceramic composition is magnesium oxide. The ceramic article of the present invention is useful in applications where it is desirable to have a transparent ceramic including, for example, in orthodontic brackets, ferrules, and gas tight envelopes.
Claims13
A transparent ceramic article consisting essentially of aluminum magnesium oxynitride, said aluminum magnesium oxynitride being a solid solution of alumina, magnesium oxide, and aluminum nitride, wherein greater than 0.5 weight percent of said solid solution of said aluminum magnesium oxynitride is magnesium oxide.
Dependencies are inferred from the claim text.