Evidence of three types of short range ordered fluorite structure in the (1 − x) Y0.15Zr0.85O1.93 – x Y0.75Nb0.25O1.75 (0 ≤ x ≤ 1) system
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2005
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Royal Society of Chemistry
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García-Martín, Susana, et al. «Evidence of Three Types of Short Range Ordered Fluorite Structure in the (1 – x) Y0.15Zr0.85O1.93–x Y0.75Nb0.25O1.75(0 ≤x≤ 1) System». Journal of Materials Chemistry, vol. 15, n.o 19, 2005, p. 1903. DOI.org (Crossref), https://doi.org/10.1039/b418557a.
Abstract
The microstructure of the high-temperature quenched oxides of the (1 − x) Y0.15Zr0.85O1.93 – x Y0.75Nb0.25O1.75 (0 ≤ x ≤ 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x = 0 end member of the solid solution (Y0.15Zr0.85O1.93) shows evidence of tetragonal fluorite-type structure; we have also observed a modulated fluorite-type structure due to short-range ordering of the oxygen vacancies. The microdomain modulated structure gradually evolves from a distorted pyrochlore-type to a type intermediate between C-type and distorted pyrochlore as x decreases from 1 to 0.3.