Linking large piezoelectric coefficients to highly flexible polarization of lead free BaTiO<sub class="emphinferior">3</sub>-CaTiO<sub class="emphinferior">3</sub>-BaZrO<sub class="emphinferior">3</sub> ceramics
BENABDALLAH, Feres
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
BENABDALLAH, Feres
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
< Reduce
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire des Matériaux Ferroélectriques [LMF]
Language
en
Article de revue
This item was published in
Journal of Applied Physics. 2011, vol. 109, n° 12, p. 124116
American Institute of Physics
English Abstract
We report a large d<sub class="emphinferior">31</sub> piezoelectric coefficient and corresponding electromechanical coupling factor, K<sub class="emphinferior">p</sub>, of 0.5Ba(Zr<sub class="emphinferior">0.2</sub>Ti<sub ...Read more >
We report a large d<sub class="emphinferior">31</sub> piezoelectric coefficient and corresponding electromechanical coupling factor, K<sub class="emphinferior">p</sub>, of 0.5Ba(Zr<sub class="emphinferior">0.2</sub>Ti<sub class="emphinferior">0.8</sub>)O<sub class="emphinferior">3</sub>-0.5(Ba<sub class="emphinferior">0.7</sub>Ca<sub class="emphinferior">0.3</sub>)TiO<sub class="emphinferior">3</sub> (BCTZ50) and 0.68Ba(Zr<sub class="emphinferior">0.2</sub>Ti<sub class="emphinferior">0.8</sub>)O<sub class="emphinferior">3</sub>-0.32(Ba<sub class="emphinferior">0.7</sub>Ca<sub class="emphinferior">0.3</sub>)TiO<sub class="emphinferior">3</sub> (BCTZ32) lead-free piezoceramics. The piezoelectric coefficient, d<sub class="emphinferior">31</sub>, reaches a high value of 200 pC/N for BCTZ50 at room temperature which is comparable to the one of the soft PZT. This confirms the previously reported d<sub class="emphinferior">33</sub> for the same material. A useful way to achieve such performances at the expense of a smaller thermal budget is suggested, enabling better control of the ceramics composition and microstructure. Based on pyroelectric and ferroelectric hysteresis loops measurements, we show that such outstanding properties are likely due to the high flexibility of polarization under thermal and electric stresses.Read less <
English Keywords
Barium compounds
Calcium compounds
Ferroelectric ceramics
Piezoceramics
Pyroelectricity
Zirconium compounds
Origin
Hal imported