Recent advances in spinel optical ceramic

Thomas J. Mroz; Thomas M. Hartnett; Joseph M. Wahl; Lee M. Goldman; James Kirsch; William R. Lindberg

doi:10.1117/12.607593

18 May 2005 Recent advances in spinel optical ceramic

Thomas J. Mroz, Thomas M. Hartnett, Joseph M. Wahl, Lee M. Goldman, James Kirsch, William R. Lindberg

Proceedings Volume 5786, Window and Dome Technologies and Materials IX; (2005) https://doi.org/10.1117/12.607593
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

New military requirements have reinvigorated the need for transparent magnesium aluminate (MgAl₂O₄) spinel. Surmet has developed a process that yields high quality transparent spinel at production scale. Several issues related to the extreme requirements of processing ultrafine spinel powders are described. Transmission data is presented for a significant dataset of parts made by this process. More recently, the process has been expanded to include a capability for producing domes for the Joint Common Missile program. Domes at nominal 6” and 7” diameter have been successfully fabricated. Despite early challenges related to the forming portion of the process, a repeatable capability for these domes has been demonstrated. Several challenges remain in spinel processing in order to support additional military requirements. In particular, the strength of the material needs further improvement. Also, improvements in optical quality with regard to inclusions are needed.

Citation Download Citation

Thomas J. Mroz, Thomas M. Hartnett, Joseph M. Wahl, Lee M. Goldman, James Kirsch, and William R. Lindberg "Recent advances in spinel optical ceramic", Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); https://doi.org/10.1117/12.607593

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