Polycrystalline sample of lead-free 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramic has been synthesized by solid state reaction method. Single-phase perovskite structure with rhombohedral symmetry was confirmed by x-ray diffraction. Temperature dependent dielectric permittivity studies demonstrated frequency independent behavior, indicating that the studied sample was not a typical relaxor ferroelectric. A polymorphic phase transition between rhombohedral and tetragonal phase was noticed near room temperature followed by a tetragonal to cubic transition with 97 °C as the temperature of maximum permittivity. The macroscopic values of d33 and d31 were ∼350 pC/N and −141 pm/V, whereas the electromechanical coupling factors kp and kt were 44.5% and 41.6%, respectively. Bulk P-E hysteresis loop was obtained with saturation polarization 11 μC/cm2 and coercive field ∼4 kV/cm. Distinct polarization contrast with a complex mosaic-like domain structure was observed in the out-of-plane mode of piezoresponse force microscopy. The domain width and the correlation length were estimated to be nearly 2 μm and 827 nm, respectively. Local hysteresis loop with apparent coercive voltage, Vc = 15.8 V, was observed.
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7 June 2013
Research Article|
June 05 2013
Synthesis and characterization of lead-free 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramic
Indrani Coondoo;
Indrani Coondoo
a)
1
Department of Materials and Ceramics Engineering & CICECO, University of Aveiro
, 3810-193 Aveiro, Portugal
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Neeraj Panwar;
Neeraj Panwar
1
Department of Materials and Ceramics Engineering & CICECO, University of Aveiro
, 3810-193 Aveiro, Portugal
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Harvey Amorín;
Harvey Amorín
2
Instituto de Ciencia de Materiales de Madrid
, CSIC, Cantoblanco, 28049 Madrid, Spain
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Miguel Alguero;
Miguel Alguero
2
Instituto de Ciencia de Materiales de Madrid
, CSIC, Cantoblanco, 28049 Madrid, Spain
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A. L. Kholkin
A. L. Kholkin
1
Department of Materials and Ceramics Engineering & CICECO, University of Aveiro
, 3810-193 Aveiro, Portugal
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
J. Appl. Phys. 113, 214107 (2013)
Article history
Received:
April 02 2013
Accepted:
May 16 2013
Citation
Indrani Coondoo, Neeraj Panwar, Harvey Amorín, Miguel Alguero, A. L. Kholkin; Synthesis and characterization of lead-free 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramic. J. Appl. Phys. 7 June 2013; 113 (21): 214107. https://doi.org/10.1063/1.4808338
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