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Proceedings Paper

Recent advances in spinel optical ceramic
Author(s): Thomas J. Mroz; Thomas M. Hartnett; Joseph M. Wahl; Lee M. Goldman; James Kirsch; William R. Lindberg
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Paper 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.

Paper Details

Date Published: 18 May 2005
PDF: 7 pages
Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.607593
Show Author Affiliations
Thomas J. Mroz, Surmet Ceramics Corp. (United States)
Thomas M. Hartnett, Surmet Corp. (United States)
Joseph M. Wahl, Surmet Corp. (United States)
Lee M. Goldman, Surmet Corp. (United States)
James Kirsch, U.S. Army Research, Development and Engineering Command (United States)
William R. Lindberg, U.S. Army Armament Research, Development and Engineering Command (United States)

Published in SPIE Proceedings Vol. 5786:
Window and Dome Technologies and Materials IX
Randal W. Tustison, Editor(s)

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