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Proceedings Paper

Fabrication of transparent spinel: the role of impurities
Author(s): Ivar E. Reimanis; Keith Rozenburg; Hans-Joachim Kleebe; Ronald L. Cook
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Paper Abstract

Densification and microstructural evolution of transparent magnesium aluminate spinel (MgAl2O4) were examined through systematic experiments that focus on the role of impurities in the starting powders. Up to 1 wt. % LiF was added to very fine spinel powder synthesized by a metal-exchange method. The material was densified by pressing at elevated temperatures. Very high transmissivity was achieved under appropriate conditions. A layered spinel/LiF/spinel specimen was also fabricated with the intent of better understanding the role of LiF on microstructure development. Its presence can lead to accelerated grain growth, or growth suppression, depending on a complex interplay of chemistry, concentration and processing schedule.

Paper Details

Date Published: 18 May 2005
PDF: 8 pages
Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); doi: 10.1117/12.604622
Show Author Affiliations
Ivar E. Reimanis, Colorado School of Mines (United States)
Keith Rozenburg, Colorado School of Mines (United States)
Hans-Joachim Kleebe, Colorado School of Mines (United States)
Ronald L. Cook, TDA Research (United States)

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

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