Lanthana-Doped Yttria: A New Infrared Window Material

W. H. Rhodes; G. C. Wei; E. A. Trickett

doi:10.1117/12.936410

19 December 1986 Lanthana-Doped Yttria: A New Infrared Window Material

W. H. Rhodes, G. C. Wei, E. A. Trickett

Proceedings Volume 0683, Infrared and Optical Transmitting Materials; (1986) https://doi.org/10.1117/12.936410
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

Lanthana-doped yttria has a number of favorable intrinsic properties for infrared window applications. La203 is a sintering aid which makes possible pore-free transparent polycrystalline near-net-shape domes and windows by a unique transient second solid-phase sintering technique. This same second phase can be retained by special anneals to impart mechanical toughening by a second-phase crack-deflection mechanism. Transmission electron microscopy has been utilized to characterize crack deflection and the complex second phase nucleation and growth process. Reduced absorption coefficients have been achieved through improved processing, 0H- removal, and stoichiometry adjustments. The trade-off between mechanical and optical properties has been quantified, and a region of promising compromise identified.

Citation Download Citation

W. H. Rhodes, G. C. Wei, and E. A. Trickett "Lanthana-Doped Yttria: A New Infrared Window Material", Proc. SPIE 0683, Infrared and Optical Transmitting Materials, (19 December 1986); https://doi.org/10.1117/12.936410

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