A new powder production route for transparent spinel windows: powder synthesis and window properties

被引:29
作者
Cook, R [1 ]
Kochis, M [1 ]
Reimanis, I [1 ]
Kleebe, HJ [1 ]
机构
[1] TDA Res Inc, Wheat Ridge, CO 80033 USA
来源
Window and Dome Technologies and Materials IX | 2005年 / 5786卷
关键词
boehmite; metal exchange; alumoxane; organomagnesium; spinel; transparent; nanoparticles;
D O I
10.1117/12.602983
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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.
引用
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页码:41 / 47
页数:7
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