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Proceedings Paper

Fabrication of large thick panels of transparent spinel
Author(s): Mark Patterson; Gary A. Gilde; Donald W. Roy
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Paper Abstract

The use of magnesium aluminate spinel for optical windows, domes and armor has previously been investigated for a wide range of specific applications. The material properties rival that of ALON and sapphire, although there exists the potential for the fabrication of larger parts at significantly lower costs. The ability to fabricate transparent spinel by hot-pressing into large plates has gained interest for the fabrication of low-cost transparent armor for a range of applications. The present paper describes development efforts that are underway to fabricate spinel panels up to 22 inches in diameter and 0.5 inches thick. A 600 ton press is being installed at a facility in Millersville, MD that will be able to fabricate 22 inch diameter parts by late 2002. In the future, this press will potentially be able to fabricate 40 inch diameter plates with minimal changes. There is additional interest in these plates for large IR windows.

Paper Details

Date Published: 2 November 2001
PDF: 7 pages
Proc. SPIE 4452, Inorganic Optical Materials III, (2 November 2001); doi: 10.1117/12.446887
Show Author Affiliations
Mark Patterson, Technology Assessment & Transfer, Inc. (United States)
Gary A. Gilde, Army Research Lab. (United States)
Donald W. Roy, Consultant (United States)

Published in SPIE Proceedings Vol. 4452:
Inorganic Optical Materials III
Alexander J. Marker; Mark J. Davis, Editor(s)

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