Akram, F, Zeb, A, Habib, M et al. (8 more authors) (2022) Piezoelectric performance of the binary K1/2Bi1/2TiO3–LiTaO3 relaxor-ferroelectric ceramics. Materials Chemistry and Physics, 279. 125764. ISSN 0254-0584
Abstract
The (1-x)K1/2Bi1/2TiO3 - xLiTaO3 lead-free perovskite solid solution, x ≤ 0.08, is shown to be a relaxor-ferroelectric with enhanced electromechanical properties for compositions x = 0.02–0.03. The X-ray powder diffraction data revealed: tetragonal for x = 0 and 0.01; mixed phases (tetragonal and cubic) at x = 0.02–0.03; and single phase cubic at x = 0.04. Mixed phase compositions, x = 0.02–0.03, gave a Berlincourt piezoelectric charge coefficient (d33) of 135 pC/N with electric field induced strains of up to 0.14% (at applied electric field 50 kV/cm). The maximum value of relative permittivity (ϵr) was ∼5200 for composition x = 0.20 at 1 kHz. The ferroelectric-polarization response for the mixed phase compositions showed evidence of ferroelectric switching, with coercive fields (Ec) is ∼20 kV/cm and remnant polarization (Pr) approximately 10 μC/cm2.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Lead-free; Mixed phases; K1/2Bi1/2TiO3–LiTaO3; Relaxor-ferroelectric system; Piezoelectric |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Feb 2022 15:16 |
Last Modified: | 04 Feb 2022 15:16 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.matchemphys.2022.125764 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:183175 |