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Temperature‐Dependent Poling Behavior of Lead‐free BZT–BCT Piezoelectrics
Author(s) -
Li Binzhi,
Blendell John E.,
Bowman Keith J.
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04758.x
Subject(s) - poling , piezoelectricity , curie temperature , intergranular corrosion , materials science , strain (injury) , grain boundary , condensed matter physics , lattice (music) , mineralogy , chemistry , ferroelectricity , composite material , optoelectronics , dielectric , physics , microstructure , medicine , ferromagnetism , acoustics
A high temperature poling method to improve the piezoelectric properties of the recently discovered lead‐free system: Ba(Zr 0.2 Ti 0.8 )O 3 –x(Ba 0.7 Ca 0.3 )TiO 3 ( BZT–BCT ) has been developed. The effective d 33 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.