Modulated fluorite-type structure of materials from the (1-x)Y0.5Zr0.5O1.75-xY0.75Nb0.25O1.75 (0≤x≤1) system

被引：38

作者：

García-Martín, S

Alario-Franco, MA

Fagg, DP

Feighery, AJ

Irvine, JTS

机构：

[1] Univ Complutense Madrid, Fac Ciencias Quim, Dept Quim Inorgan, E-28040 Madrid, Spain

[2] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

来源：

CHEMISTRY OF MATERIALS | 2000年 / 12卷 / 06期

关键词：

D O I：

10.1021/cm991204l

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructures of different high-temperature prepared oxides of the (1-x)Y0.5Zr0.5O1.75-xY(0.75)Nb(0.25)O(1.75) (0 less than or equal to x less than or equal to 1) system have been studied by selected-area electron diffraction and high-resolution transmission electron microscopy. The materials show a modulated fluorite-type structure mainly due to a partial or short-range ordering of the oxygen vacancies. The modulation is related to the pyrochlore-type structure in the Y0.75Nb0.25O1.75 A short-range ordering of the oxygen vacancies related to the C-type structure is observed in the Y0.5Zr0.5O1.75. Gradual transition from the pyrochlore to the C-type structures is established with the variation of the composition.

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页码：1729 / 1737

页数：9

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