11 May 2009 Polycrystalline alumina for aerodynamic IR domes and windows
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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.
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Mark V. Parish, Mark V. Parish, Marina R. Pascucci, Marina R. Pascucci, } "Polycrystalline alumina for aerodynamic IR domes and windows", Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 730205 (11 May 2009); doi: 10.1117/12.818158; https://doi.org/10.1117/12.818158
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