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.
Similar content being viewed by others
References
M.A. Subramanian, G. Aravamudan, and G.V. Subba Rao: Oxide pyrochlores—A review. Prog. Solid State Chem. 15, 55 (1983).
PJ. Wilde and C.R.A. Catlow: Defects and diffusion in pyrochlore structured oxides. Solid State Ionics 112, 173 (1998).
L. Minervini, R.W. Grimes, and K.E. Sickafus: Disorder in Pyrochlore Oxides. J. Am. Ceram. Soc. 1873 (2000).
C.R. Stanek, L. Minervini, and R.W. Grimes: Nonstoichiometry in A2B2O7 Pyrochlores. J. Am. Ceram. Soc. 85, 2792 (2002)
K.E. Sickafus, L. Minervini, R.W. Grimes, J.A. Valdez, M. Ishimaru, F. Li, K.J. McClellan, and T. Hartmann: Radiation Tolerance of Complex Oxides. Science 5480, 748 (2000).
M. Leslie: Technical Report—DL/SCI/TM31T. U.K. Science and Engineering Research Council—Daresbury Laboratory, Warrington, U.K., 1982.
J.D. Gale: GULP: A computer program for the symmetry-adapted simulation of solids. J. Chem. Soc. Faraday Trans. 1997, 93, 629 (1997).
C.R. Stanek and R.W. Grimes: Prediction of rare-earth A2Hf2O7 pyrochlore phases. J. Am. Ceram. Soc. 85, 2139 (2002).
S.S. Kiparisov, R.A. Belyaev, A.I. Belyakov, V.V. Kondarenko, V.P. Vyskubov, V.G. Kozlov, S.A. Kuznetsov, and L.P. Melikhova: The phase diagram of the system Eu2O3-ZrO2. Inorg. Mater. 12, 1393 (1976).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Rushton, M.J.D., Grimes, R.W., Stanek, C.R. et al. Predicted pyrochlore to fluorite disorder temperature for A2Zr2O7 compositions. Journal of Materials Research 19, 1603–1604 (2004). https://doi.org/10.1557/JMR.2004.0231
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.2004.0231