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Metastable Phase Evolution in TiO2-YO3/2-ZrO2

  • Tobias Schaedler (a1), Solome Girma (a2) (a3), Ashutosh S. Gandhi (a1), Sanjay Sampath (a2) and Carlos G. Levi (a1)...


The metastable-to-equilibrium phase evolution over a wide range of compositions in the TiO2-YO3/2-ZrO2 system was investigated. The competing phases are all derivatives of the fluorite structure and compositions within the fluorite and pyrochlore fields exhibit technologically interesting ionic and mixed ionic-electronic conductivity. Powders of various compositions were synthesized by precursor routes, pyrolyzed and subsequently heat-treated in a stepwise manner at progressively higher temperatures to explore the sequence of phase evolution. Extended solid solutions with amorphous, fluorite and ordered pyrochlore structures were produced over significant composition ranges within the ternary. The study also sheds new light on the correct form of the phase equilibria at 1300°C.



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1. Levi, C.G., Acta Materialia 46, 787 (1998).
2. Yokokawa, H., Sakai, N., Kawada, T., and Dokiya, M., Science and Technology of Zirconia V, edited by Badwal, S.P.S., Bannister, M.J., and Hannink, R.H.J., (Technomic Pub. Co., Lancaster PA, 1993) p. 59.
3. Subramanian, M.A., Aravamudan, G., and Rao, G.V.S., Progress in Solid State Chemistry 15(2), 55 (1983).
4. Jayaram, V., DeGraef, M., and Levi, C.G., Acta Metallurgica et Materialia 42(6), 1829 (1994).
5. Hyde, B.G. and Andersson, S., Inorganic Crystal Structures, 1st ed. (John Wiley & Sons, New York, 1989) p. 277.
6. Wuensch, B.J., Eberman, K.W., Heremans, C., Ku, E.M., Onnerud, P., Yeo, E.M., Haile, S.M., Stalick, J.K., and Jorgensen, J.D., Solid State Ionics 129, 111 (2000).
7. Feighery, A.J., Irvine, J.T.S., Fagg, D.P., and Kaiser, A., Journal of Solid State Chemistry 143, 273 (1999).
8. Schaedler, T., Francillon, W., Gandhi, A.S., Grey, C.P., Sampath, S., and Levi, C.G., Journal of Materials Research (submitted 2004).
9. McHale, A.E. and Roth, R.S., Journal of the American Ceramic Society 69, 827 (1986).
10. Zhang, H. and Banfield, J., Chemistry of Materials, 14, 4145 (2002).
11. Ushakov, S.V., Brown, C.E., and Navrotsky, A., Journal of Materials Research 19(3), 693 (2004).
12. Shin, H., Agarwal, M., DeGuire, M.R., and Heuer, A.H., Journal of the American Ceramic Society 79, 1975 (1996).


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