An improved soft-chemistry approach to the preparation of spinel powders

Ronald Cook

doi:10.1117/12.719587

2 May 2007 An improved soft-chemistry approach to the preparation of spinel powders

Ronald Cook

Proceedings Volume 6545, Window and Dome Technologies and Materials X; 654512 (2007) https://doi.org/10.1117/12.719587
Event: Defense and Security Symposium, 2007, 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. In previous work, the spinel powders were prepared by the reaction of surface-modified boehmite nanoparticles with magnesium acetylacetonate. While the magnesium acetylacetonate can produce small quantities of high quality spinel powders, it use for large scale production of spinel powders is problematic. Through a thermodynamic analysis we have identified a new high-purity, low-cost, low-toxicity organomagnesium compound that reacts the with surface modified boehmite nanoparticles to produce a spinel precursor. The magnesium doped precursor readily transforms into pure phase spinel at temperature between 900°C and 1200°C.

Citation Download Citation

Ronald Cook "An improved soft-chemistry approach to the preparation of spinel powders", Proc. SPIE 6545, Window and Dome Technologies and Materials X, 654512 (2 May 2007); https://doi.org/10.1117/12.719587

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