Modulated Fluorite-Type Structure of Materials from the (1-x) Y0.5Zr0.5O1.75 - x Y0.75Nb0.25O1.75 (0£x£ 1) System

S García-Martín; MA Alario-Franco; DP Fagg; AJ Feighery; John Thomas Sirr Irvine

doi:10.1021/cm991204l

Modulated Fluorite-Type Structure of Materials from the (1-x) Y_0.5Zr_0.5O_1.75 - x Y_0.75Nb_0.25O_1.75 (0£x£ 1) System

S García-Martín, MA Alario-Franco, DP Fagg, AJ Feighery, John Thomas Sirr Irvine

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	1729-1737
Number of pages	9
Journal	Chemistry of Materials
Volume	12
DOIs	https://doi.org/10.1021/cm991204l
Publication status	Published - Jun 2000

Keywords

YTTRIA-STABILIZED ZIRCONIA
MICRODOMAIN FORMATION
NEUTRON-DIFFRACTION
DIFFUSE-SCATTERING
CRYSTAL-CHEMISTRY
SOLID-SOLUTIONS
ELECTRON
PHASES
PYROCHLORE

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10.1021/cm991204l

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@article{70d889a6c0bf42b4b95bd8f5f68bf9f2,

title = "Modulated Fluorite-Type Structure of Materials from the (1-x) Y0.5Zr0.5O1.75 - x Y0.75Nb0.25O1.75 (0£x£ 1) System",

abstract = "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.",

keywords = "YTTRIA-STABILIZED ZIRCONIA, MICRODOMAIN FORMATION, NEUTRON-DIFFRACTION, DIFFUSE-SCATTERING, CRYSTAL-CHEMISTRY, SOLID-SOLUTIONS, ELECTRON, PHASES, PYROCHLORE",

author = "S Garc{\'i}a-Mart{\'i}n and MA Alario-Franco and DP Fagg and AJ Feighery and Irvine, {John Thomas Sirr}",

year = "2000",

month = jun,

doi = "10.1021/cm991204l",

language = "English",

volume = "12",

pages = "1729--1737",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society (ACS)",

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T1 - Modulated Fluorite-Type Structure of Materials from the (1-x) Y0.5Zr0.5O1.75 - x Y0.75Nb0.25O1.75 (0£x£ 1) System

AU - García-Martín, S

AU - Alario-Franco, MA

AU - Fagg, DP

AU - Feighery, AJ

AU - Irvine, John Thomas Sirr

PY - 2000/6

Y1 - 2000/6

N2 - 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.

AB - 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.

KW - YTTRIA-STABILIZED ZIRCONIA

KW - MICRODOMAIN FORMATION

KW - NEUTRON-DIFFRACTION

KW - DIFFUSE-SCATTERING

KW - CRYSTAL-CHEMISTRY

KW - SOLID-SOLUTIONS

KW - ELECTRON

KW - PHASES

KW - PYROCHLORE

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U2 - 10.1021/cm991204l

DO - 10.1021/cm991204l

M3 - Article

SN - 0897-4756

VL - 12

SP - 1729

EP - 1737

JO - Chemistry of Materials

JF - Chemistry of Materials

ER -

Modulated Fluorite-Type Structure of Materials from the (1-x) Y_0.5Zr_0.5O_1.75 - x Y_0.75Nb_0.25O_1.75 (0£x£ 1) System

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