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Lattice evolution and enhanced piezoelectric properties of hydrothermally synthesised 0.94(Bi0.5Na0.5)TiO3–0.06BaTiO3 nanofibers

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Abstract

In this work, a facile low-temperature hydrothermal method accompanied by a moderate annealing process is introduced to synthesise highly crystallized lead-free piezoelectric 0.94(Bi0.5Na0.5)TiO3–0.06BaTiO3 (BNBT) nanofibers where sodium ions in the native (Bi0.5Na0.5)TiO3 (BNT) lattice are substituted with larger barium ions. The BNBT nanofibers are typically 150–200 nm in diameter composed of a confirmed pure perovskite phase with the orientation of (101) along the fiber length direction. A rhombohedral lattice structure was verified by transmission electron microscopy measurements after introducing barium into the BNT structure. Solid-state 23Na NMR evidenced a reduced disorder in the primary A site of the BNBT as compared to the BNT, along with the formation of additional Na environments, which were assigned to an inhomogeneous distribution of Ba in the system. A significant piezoelectric constant of d33 = ∼26 ± 2 pm V−1 in the diameter direction was found for these BNBT nanofibers.

Graphical abstract: Lattice evolution and enhanced piezoelectric properties of hydrothermally synthesised 0.94(Bi0.5Na0.5)TiO3–0.06BaTiO3 nanofibers

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Publication details

The article was received on 22 Aug 2017, accepted on 02 Oct 2017 and first published on 03 Oct 2017


Article type: Paper
DOI: 10.1039/C7TC03812G
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Lattice evolution and enhanced piezoelectric properties of hydrothermally synthesised 0.94(Bi0.5Na0.5)TiO3–0.06BaTiO3 nanofibers

    M. B. Ghasemian, A. Rawal, F. Wang, D. Chu and D. Wang, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC03812G

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