Nitrogen-Stabilized Aluminum Oxide Spinel (ALON)

Normand D. Corbin; James W. McCauley

doi:10.1117/12.932479

26 February 1982 Nitrogen-Stabilized Aluminum Oxide Spinel (ALON)

Normand D. Corbin, James W. McCauley

Author Affiliations +

Proceedings Volume 0297, Emerging Optical Materials; (1982) https://doi.org/10.1117/12.932479
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

A new ceramic, nitrogen-stabilized aluminum oxide spinel (ALON), has been developed at AMMRC which may have distinct advantages over sintered polycrystalline a-A1₂0₃. This material is isotropic and has been fabricated into dense, transparent bodies with the following properties: Knoop (100) hardness of 1800, elastic modulus of 46x10⁶ psi, a room temperature fracture strength of 45x10³ psi, a dielectric constant and loss tan%ent, respectively, at 10 MHz of 8.56 and 0.0004, trivial oxidation in air up to 1200 C and IR cutoff at 5.2 μm, and an average thermal expansion coefficient (a) of 7.00x10-⁶C -1 (25Ã‚Â°C-1000Ã‚Â°C).

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Normand D. Corbin and James W. McCauley "Nitrogen-Stabilized Aluminum Oxide Spinel (ALON)", Proc. SPIE 0297, Emerging Optical Materials, (26 February 1982); https://doi.org/10.1117/12.932479

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