18 May 2005 A new powder production route for transparent spinel windows: powder synthesis and window properties
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Proceedings Volume 5786, Window and Dome Technologies and Materials IX; (2005); doi: 10.1117/12.602983
Event: Defense and Security, 2005, Orlando, Florida, United States
Abstract
Spinel powders for the production of transparent polycrystalline ceramic windows have been produced using a number of traditional ceramic and sol-gel methods. We have demonstrated that magnesium aluminate spinel powders produced from the reaction of organo-magnesium compounds with surface modified boehmite precursors can be used to produce high quality transparent spinel parts. The new powder production method allows fine control over the starting particle size, size distribution, purity and stoichiometry. The new process involves formation of a boehmite sol-gel from the hydrolysis of aluminum alkoxides followed by surface modification of the boehmite nanoparticles using carboxylic acids. The resulting surface modified boehmite nanoparticles can then be metal exchanged at room temperature with magnesium acetylacetonate to make a precursor powder that is readily transformed into pure phase spinel.
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Ronald Cook, Michael Kochis, Ivar Reimanis, Hans-Joachim Kleebe, "A new powder production route for transparent spinel windows: powder synthesis and window properties", Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.602983; https://doi.org/10.1117/12.602983
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KEYWORDS
Spinel

Magnesium

Aluminum

Ceramics

Sol-gels

Crystals

Particles

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