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Effects of Bi2O3 additive on sintering process and dielectric, ferroelectric, and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

Hayati, Raziye and Bahrevar, Mohammed Ali and Edadzadeh, Touradj and Rojas, Virginia and Novak, Nikola and Koruza, Jurij (2016):
Effects of Bi2O3 additive on sintering process and dielectric, ferroelectric, and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics.
In: Journal of the European Ceramic Society, pp. 3391-3400, 36, (14), ISSN 0955-2219,
[Online-Edition: http://www.sciencedirect.com/science/article/pii/S0955221916...],
[Article]

Abstract

Lead-free Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) piezoceramics with Bi2O3 additive were synthesized using solidstate ceramic processing. Various amounts of Bi2O3 (0.05, 0.1, 0.5, and 1.0 mol%) were added after calcination, milled, compacted, and sintered with no compensation at A- or B-sites. Addition of up to 0.5 mol% Bi2O3 was found to greatly enhance the densification and increase the piezoelectric properties,while higher amounts decreased the grain size and induced relaxor-like electrical behavior, obeying the Vogel-Fulcher model. The highest properties were obtained for the BCZT with 0.1 mol% Bi2O3 sintered at 1350 ◦C: d33 = 325 pC/m, d33* = 509 pm/V (at 3 kV/mm), kp = 0.42, and Pr = 10.4 °C/cm2. The microstructure, phase composition, and local structure were investigated by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The appearance of the A1g vibration mode in the Raman spectra and the shift of diffraction peaks to lower 2 Theata values indicate the incorporation of Bi3+ into the B-site of the perovskite BCZT structure.

Item Type: Article
Erschienen: 2016
Creators: Hayati, Raziye and Bahrevar, Mohammed Ali and Edadzadeh, Touradj and Rojas, Virginia and Novak, Nikola and Koruza, Jurij
Title: Effects of Bi2O3 additive on sintering process and dielectric, ferroelectric, and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics
Language: English
Abstract:

Lead-free Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) piezoceramics with Bi2O3 additive were synthesized using solidstate ceramic processing. Various amounts of Bi2O3 (0.05, 0.1, 0.5, and 1.0 mol%) were added after calcination, milled, compacted, and sintered with no compensation at A- or B-sites. Addition of up to 0.5 mol% Bi2O3 was found to greatly enhance the densification and increase the piezoelectric properties,while higher amounts decreased the grain size and induced relaxor-like electrical behavior, obeying the Vogel-Fulcher model. The highest properties were obtained for the BCZT with 0.1 mol% Bi2O3 sintered at 1350 ◦C: d33 = 325 pC/m, d33* = 509 pm/V (at 3 kV/mm), kp = 0.42, and Pr = 10.4 °C/cm2. The microstructure, phase composition, and local structure were investigated by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The appearance of the A1g vibration mode in the Raman spectra and the shift of diffraction peaks to lower 2 Theata values indicate the incorporation of Bi3+ into the B-site of the perovskite BCZT structure.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 36
Number: 14
Uncontrolled Keywords: Lead free BCZT Bi2O3 addition Microstructure Piezoelectric Relaxor
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 27 Jun 2016 05:40
Official URL: http://www.sciencedirect.com/science/article/pii/S0955221916...
Identification Number: doi:10.1016/j.jeurceramsoc.2016.05.033
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