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

Wang, Ge; Goetzee-Barral, Anton; Lu, Zhilun; Keeble, Dean S.; Hall, David A

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.

Citation

Wang, G., Goetzee-Barral, A., Lu, Z., Keeble, D. S., & Hall, D. A. (2021). Thermally-induced local structural transformations in Na0.5Bi0.5TiO3-KNbO3 ceramics. Journal of the European Ceramic Society, 41(6), 3832-3837. https://doi.org/10.1016/j.jeurceramsoc.2021.01.040

• Journal Article Type: Article
• Acceptance Date: Jan 21, 2021
• Online Publication Date: Jan 27, 2021
• Publication Date: 2021-06
• Deposit Date: Oct 23, 2021
• Journal: Journal of the European Ceramic Society
• Print ISSN: 0955-2219
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 41
• Issue: 6
• Pages: 3832-3837
• DOI: https://doi.org/10.1016/j.jeurceramsoc.2021.01.040
• Keywords: NBT, X-ray scattering, Pair distribution function, Local structure
• Public URL: http://researchrepository.napier.ac.uk/Output/2815982