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Licensed Unlicensed Requires Authentication Published by De Gruyter June 11, 2013

Reactions in the sintering of MgAl2O4 spinel doped with LiF

  • Ivar E. Reimanis and Hans-Joachim Kleebe

Abstract

Reactions between MgAl2O4 and LiF during low-temperature sintering have been examined by transmission electron microscopy. It is shown that the presence of LiF at elevated temperatures leads to the formation of a defect MgAl2O4 spinel phase containing oxygen vacancies due to the incorporation of both Li and F ions into the crystal lattice. Consequently, densification is promoted via the diffusion of oxygen vacancies. Note that neither of the lithium aluminate phases, LiAlO2 and Li2Al4O7, were detected.


* Correspondence address, Ivar Reimanis Metallurgical and Materials Engineering Department Colorado School of Mines Golden, Colorado 80403, USA Tel.: +1 303 273 3549 Fax: +1 303 273 3057 E-mail:

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Received: 2007-6-2
Accepted: 2007-9-12
Published Online: 2013-06-11
Published in Print: 2007-12-01

© 2007, Carl Hanser Verlag, München

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