Thermally-induced local structural transformations in Na0.5Bi0.5TiO3-KNbO3 ceramics

Ge Wang; Anton Goetzee-Barral; Zhilun Lu; Dean Keeble; David Hall

doi:10.1016/j.jeurceramsoc.2021.01.040

Thermally-induced local structural transformations in Na0.5Bi0.5TiO3-KNbO3 ceramics

Ge Wang, Anton Goetzee-Barral, Zhilun Lu, Dean Keeble, David Hall

Materials Engineering

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Abstract

The local symmetry of (1-x)Na0.5Bi0.5TiO3-xKNbO3 (NBT-xKN, x=0.01-0.07) ceramics was thoroughly examined using high-energy synchrotron x-ray scattering and analysed using the Pair-Distribution Function (PDF) method. At room temperature, the structure of NBT-xKN (x=0.01-0.07) ceramics was best refined using monoclinic C1c1 structures within the local-range (r<22 Å) and rhombohedral R3c within medium-range (22 Å <r <52 Å). Furthermore, the local monoclinic C1c1 structure exists from room temperature to > 420 °C (above the temperature of the maximum dielectric peak, Tm), as confirmed by in-situ temperature-dependent PDF analysis.

Original language	English
Journal	Journal of the American Ceramic Society
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2021.01.040
Publication status	Published - 27 Jan 2021

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Wang-JACS-2021-1-JACSAccepted author manuscript, 0.98 MB

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title = "Thermally-induced local structural transformations in Na0.5Bi0.5TiO3-KNbO3 ceramics",

abstract = "The local symmetry of (1-x)Na0.5Bi0.5TiO3-xKNbO3 (NBT-xKN, x=0.01-0.07) ceramics was thoroughly examined using high-energy synchrotron x-ray scattering and analysed using the Pair-Distribution Function (PDF) method. At room temperature, the structure of NBT-xKN (x=0.01-0.07) ceramics was best refined using monoclinic C1c1 structures within the local-range (r<22 {\AA}) and rhombohedral R3c within medium-range (22 {\AA} 420 °C (above the temperature of the maximum dielectric peak, Tm), as confirmed by in-situ temperature-dependent PDF analysis.",

author = "Ge Wang and Anton Goetzee-Barral and Zhilun Lu and Dean Keeble and David Hall",

year = "2021",

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day = "27",

doi = "10.1016/j.jeurceramsoc.2021.01.040",

language = "English",

journal = "Journal of the American Ceramic Society",

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T1 - Thermally-induced local structural transformations in Na0.5Bi0.5TiO3-KNbO3 ceramics

AU - Wang, Ge

AU - Goetzee-Barral, Anton

AU - Lu, Zhilun

AU - Keeble, Dean

AU - Hall, David

PY - 2021/1/27

Y1 - 2021/1/27

N2 - The local symmetry of (1-x)Na0.5Bi0.5TiO3-xKNbO3 (NBT-xKN, x=0.01-0.07) ceramics was thoroughly examined using high-energy synchrotron x-ray scattering and analysed using the Pair-Distribution Function (PDF) method. At room temperature, the structure of NBT-xKN (x=0.01-0.07) ceramics was best refined using monoclinic C1c1 structures within the local-range (r<22 Å) and rhombohedral R3c within medium-range (22 Å 420 °C (above the temperature of the maximum dielectric peak, Tm), as confirmed by in-situ temperature-dependent PDF analysis.

AB - The local symmetry of (1-x)Na0.5Bi0.5TiO3-xKNbO3 (NBT-xKN, x=0.01-0.07) ceramics was thoroughly examined using high-energy synchrotron x-ray scattering and analysed using the Pair-Distribution Function (PDF) method. At room temperature, the structure of NBT-xKN (x=0.01-0.07) ceramics was best refined using monoclinic C1c1 structures within the local-range (r<22 Å) and rhombohedral R3c within medium-range (22 Å 420 °C (above the temperature of the maximum dielectric peak, Tm), as confirmed by in-situ temperature-dependent PDF analysis.

U2 - 10.1016/j.jeurceramsoc.2021.01.040

DO - 10.1016/j.jeurceramsoc.2021.01.040

M3 - Article

SN - 0002-7820

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

ER -

Thermally-induced local structural transformations in Na0.5Bi0.5TiO3-KNbO3 ceramics

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