The high-pressure phase sequence in nanocrystalline zirconia

P. Bouvier (), V. Dmitriev and G. Lucazeau

The European Physical Journal B: Condensed Matter and Complex Systems, 2003, vol. 35, issue 3, 301-309

Abstract: X-ray diffraction and Raman data on the pressure induced phase transitions of a nanometric zirconia, ZrO 2 , are analyzed via a classical phenomenological Landau approach of the bulk. It is concluded that the initial tetragonal structure (D 4h 15 ), which is a metastable bulk state of zirconia at ambient conditions, evolves continuously towards the ideal cubic fluorite structure (O h 5 ) via an intermediate tetragonal form (D 4h 14 ). The proposed phenomenological model describes consistently all experimental peculiarities, including the hybridization and softening of the low-frequency Raman active modes along with lattice-parameter anomalies. Copyright Springer-Verlag Berlin/Heidelberg 2003

Date: 2003
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DOI: 10.1140/epjb/e2003-00281-5

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