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

DOI: 10.1016/j.jeurceramsoc.2021.01.040 DOI Help

Authors: Ge Wang (University of Sheffield; University of Manchester) , Anton Goetzee-Barral (University of Leeds) , Zhilun Lu (University of Sheffield) , Dean S. Keeble (Diamond Light Source) , David A. Hall (University of Manchester)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The European Ceramic Society , VOL 35

State: Published (Approved)
Published: January 2021
Diamond Proposal Number(s): 17691

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.

Journal Keywords: NBT; X-ray scattering; Pair distribution function; local structure

Subject Areas: Materials


Instruments: I15-1-X-ray Pair Distribution Function (XPDF)

Added On: 01/02/2021 11:56

Discipline Tags:

Ceramics Physical Chemistry Chemistry Materials Science

Technical Tags:

Scattering Pair Distribution Function (PDF)