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Proceedings Paper

Polycrystalline alumina for aerodynamic IR domes and windows
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Paper Abstract

CeraNova's transparent polycrystalline alumina (CeraLuminTM)a has sub-micron grain size (300-500nm) and high transmittance in the mid-wave infrared (>85% in the 3-5µm MWIR region). The fine, uniform grain size imparts high hardness, high strength, and high thermal shock resistance. Polycrystalline alumina is a viable alternative to sapphire for domes, particularly for aerodynamic shapes which are readily fabricated by powder processing. Both hemispheric and ogive domes (sub-scale and full-size) have been successfully molded and densified to transparency. Hemispheric domes have been optically finished. Current efforts include a focus on scale-up, fabrication, and metrology of aerodynamic domes. This paper presents recent analyses of microstructure, optical properties, and mechanical properties.

Paper Details

Date Published: 11 May 2009
PDF: 8 pages
Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 730205 (11 May 2009); doi: 10.1117/12.818158
Show Author Affiliations
Mark V. Parish, CeraNova Corp. (United States)
Marina R. Pascucci, CeraNova Corp. (United States)


Published in SPIE Proceedings Vol. 7302:
Window and Dome Technologies and Materials XI
Randal W. Tustison, Editor(s)

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