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Ferroelectric aging effects and large recoverable electrostrain in ceria‐doped BaTiO 3 ceramics
Author(s) -
Yan Kang,
Wang Fangfang,
Wu Dawei,
Ren Xiaobing,
Zhu Kongjun
Publication year - 2019
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/jace.16117
Subject(s) - materials science , ferroelectricity , doping , dopant , ceramic , ferroelectric ceramics , electronegativity , polarization (electrochemistry) , dielectric , mineralogy , composite material , optoelectronics , chemistry , organic chemistry
Ferroelectric aging is a phenomenon that is generally observed in acceptor‐doped ferroelectrics and usually produces a large recoverable electrostrain. In this work, using an oxide ionic conducting material, a Gd‐modified ceria solution ( GDC ), as a dopant, we find that GDC ‐doped BaTiO 3 ceramics exhibit ferroelectric aging behaviors at room temperature. These ceramics show double polarization hysteresis (P‐E) loops and sprout‐shaped recoverable strain vs electric field (S‐E) curves. GDC ‐doped BT ceramic (3 mol%) produces a large recoverable electrostrain of 0.12% at 3 kV /cm. The large ions of Ce 3+ and Gd 3+ , which have small electronegativity, lead to the high mobility of oxygen vacancies and a rapid symmetry conformation for short range ordering ( SC ‐ SRO ) of points defects, which appear as fast aging effects and a large electrostrain in GDC ‐doped BT ceramics at room temperature.