Sintered Polycrystalline Nitrogen Stabilized Cubic Aluminum Oxide Material.
DEPARTMENT OF THE ARMY WASHINGTON D C
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This patent application covers a structural ceramic material comprising single phase polycrystalline cubic aluminum oxynitride preferably with at least 97 of theoretical density. It displays transparency and isotropic optical, thermal and electrical properties, an infrared cutoff at about 5.2 microns wavelength, and shows no chemical or physical property change after heating in air atmosphere at 1100 C.
- Ceramics, Refractories and Glass