Temperature-Dependent Poling Behavior of Lead-free BZT-BCT Piezoelectrics

A high temperature poling method to improve the piezoelectric properties of the recently discovered lead‐free system: Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 (BZT–BCT) has been developed. The effective d33 value and strain level can be increased by 40% when samples are cooled under field through the Curi...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2011-10, Vol.94 (10), p.3192-3194
Main Authors: Li, Binzhi, Blendell, John E., Bowman, Keith J.
Format: Article
Language:English
Subjects:
Ceramics
Crystal defects
Curie temperature
Deoxidizing
Grain boundaries
Lattice strain
Lead
Piezoelectricity
Strain
Temperature
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Summary:A high temperature poling method to improve the piezoelectric properties of the recently discovered lead‐free system: Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 (BZT–BCT) has been developed. The effective d33 value and strain level can be increased by 40% when samples are cooled under field through the Curie temperature. The ferroelastic domain contribution appears quite modest relative to the strain improvement. An internal bias field, induced by defect charge carriers accumulation at grain boundaries, may facilitate the intergranular interactions resulting in larger lattice strains.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2011.04758.x