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Issue 24, 2014
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High piezoelectricity of BaTiO3–CaTiO3–BaSnO3 lead-free ceramics

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Abstract

A series of solid solutions of BaTiO3x(0.4CaTiO3–0.6BaSnO3) (abbreviated as BT–x(CT–BS), x = 0.00–0.20 mol) were prepared to search for high performance lead-free piezoelectric ceramics. Through content tailoring, a complex phase transition was confirmed by X-ray diffraction and Raman spectra as well as temperature dependence of the dielectric constant, which occurs from tetragonal(T)–orthorhombic(O) coexistence at 0 ≤ x ≤ 0.12 to rhombohedral(R)–O–T and R–O/T–cubic(C) multiphase coexistence at x = 0.16 and 0.20, respectively. The lower EC = 1.31 kV cm−1 and higher Pr = 9.48 μm cm−2 as well as high piezoelectric response d33 = 570 pC N−1 were achieved in BT–x(CT–BS) ceramics at an optimal composition of x = 0.16. The ultrahigh converse piezoelectric coefficient d*33 = 1444 pm V−1 and strain = 0.070% which are the highest values reported so far in lead-free ceramics also were achieved at x = 0.16, suggesting that a BT–x(CT–BS) system is a promising lead-free alternative material for electromechanical actuator applications.

Graphical abstract: High piezoelectricity of BaTiO3–CaTiO3–BaSnO3 lead-free ceramics

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Article information


Submitted
22 Jan 2014
Accepted
02 Apr 2014
First published
12 May 2014

J. Mater. Chem. C, 2014,2, 4764-4771
Article type
Paper
Author version available

High piezoelectricity of BaTiO3–CaTiO3–BaSnO3 lead-free ceramics

L. Zhu, B. Zhang, L. Zhao and J. Li, J. Mater. Chem. C, 2014, 2, 4764
DOI: 10.1039/C4TC00155A

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