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Predicted pyrochlore to fluorite disorder temperature for A2Zr2O7 compositions

Published online by Cambridge University Press:  03 March 2011

M.J.D. Rushton ,
Robin W. Grimes ,
C.R. Stanek  and
Scott Owens
M.J.D. Rushton
Affiliation:
Department of Materials, Imperial College, Prince Consort Road, London SW7 2BP, United Kingdom
C.R. Stanek
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Scott Owens
Affiliation:
Nuclear Sciences and Technology Services, H260, Hinton House, Risley, Warrington WA3 6AS, United Kingdom
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Abstract

In a previous publication the order–disorder pyrochlore to fluorite transformation temperatures for a series of A2Hf2O7 pyrochlores were predicted [C.R. Stanek and R.W. Grimes: Prediction of rare-earth A2Hf2O7 pyrochlore phases. J. Am. Ceram. Soc. 2002, 85, p. 2139]. This was facilitated by establishing a relationship between these temperatures and the energy required to introduce a specific defect structure into the perfect pyrochlore lattice. Here an equivalent relationship for A2Zr2O7 pyrochlores was generated, and from this the disorder temperatures for a number of compositions including Eu2Zr2O7 were predicted.

Keywords

CeramicComputer simulationPhase transformation
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 6 , June 2004 , pp. 1603 - 1604
Copyright
Copyright © Materials Research Society 2004

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References

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