Abstract
MgAl2O4 is commonly found in the normal spinel structure with the Mg2+ ions located in tetrahedral sites and the Al3+ ions occupying octahedral sites. We use atomic-level simulation to characterize the effect of inversion on the elastic and thermal properties. Cation ordering and volumetric changes tend to affect the structure and properties in opposite ways, thereby compensating each other up for up to 50% inversion. For higher inversions, volumetric effects dominate. In the case of the thermal conductivity, the effects of changes in the elastic properties and thermal expansion essentially cancel over the entire range of inversion.
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Acknowledgements
We are happy to acknowledge the University of Florida High-Performance Computing Center for providing computational resources and support that have contributed significantly to the research results reported in this article. This work was funded by DOE-NERI Award DE-FC07-05ID14647 and by a Materials World Network Project, NSF DMR-0710523.
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Shukla, P., Chernatynskiy, A., Nino, J.C. et al. Effect of inversion on thermoelastic and thermal transport properties of MgAl2O4 spinel by atomistic simulation. J Mater Sci 46, 55–62 (2011). https://doi.org/10.1007/s10853-010-4795-7
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DOI: https://doi.org/10.1007/s10853-010-4795-7