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Phase coexistence and large piezoelectricity in BaTiO 3 ‐CaSnO 3 lead‐free ceramics
Author(s) -
Yang Yang,
Zhou Yibei,
Ren Juan,
Zheng Qiaoji,
Lam Kwok Ho,
Lin Dunmin
Publication year - 2018
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.15416
Subject(s) - piezoelectricity , tetragonal crystal system , ferroelectricity , materials science , ceramic , condensed matter physics , orthorhombic crystal system , trigonal crystal system , phase (matter) , phase transition , polarization (electrochemistry) , mineralogy , crystallography , dielectric , crystal structure , chemistry , composite material , physics , optoelectronics , organic chemistry
Ferroelectric phase coexistence was constructed in (1− x )BaTiO 3 ‐ x CaSnO 3 lead‐free ceramics, and its relationship with the piezoelectricity of the materials was investigated to ascertain potential factors for strong piezoelectric response. It is found that the addition of CaSnO 3 caused a series of phase transitions in the (1− x )BaTiO 3 ‐ x CaSnO 3 ceramics, and a ferroelectric coexistence of rhombohedral, orthorhombic, and tetragonal phases is formed at x = 0.08, where the ceramics exhibit the lowest energy barrier and consequently facilitate the polarization rotation and extension, resulting in the optimal piezoelectricity of d 33 and k p values of 550 pC/N and 0.60, respectively. Our study provides an intuitive insight to understand the origin of high piezoelectricity in the ceramics with the coexistence of multiferroelectric phases.