Simultaneously enhanced piezoelectricity and curie temperature in BiFeO3-based high temperature piezoelectrics. Issue 15 (December 2021)

• Record Type: Journal Article
• Authors: Wu, Jie; Zhao, Gaochao; Pan, Chengbing; Tong, Peng; Yang, Jie; Zhu, Xuebin; Yin, Lihua; Song, Wenhai; Sun, Yuping
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 15(2021)
• Page Start: 7645
• Page End: 7653
• Publication Date: 2021-12
• Subjects: Piezoelectricity -- BiFeO3 -- High curie temperature -- High depolarization temperature; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.08.030
• Languages: English
• ISSNs: 0955-2219

Abstract

Highlights: Structure-piezoelectricity relation were studied for a serial of MPB samples. The tetragonal distortion dominates the improved piezoelectricity near MPB. All the MPB samples show promising multiferroic and magnetoelectric properties. A new strategy for designing high-performance piezoelectric ceramics was obtained. Abstract: We report the structure, dielectric, ferroelectric and piezoelectric properties of Cr-Mn co-doped (1- y )BiFe1- x Cr x O3 - y BaTi1- x Mn x O3 (0≤ x ≤0.04, 0.2≤ y ≤0.27) ceramics. By varying both x and y, a series of samples near morphotropic phase boundaries exhibiting both high ferroelectric Curie temperature T C (∼580−643 °C) and relatively large piezoelectric constant d 33 are constructed. Especially, the sample with y = 0.24 and x = 0.02 is found to show coexistence of high depolarization temperature T d (∼551 °C) and relatively large d 33 ∼116 pC/N, superior to most of those of BiFeO3 based high-temperature piezoceramics reported previously. The enhanced ferroelectric T C in the Cr-Mn modified samples can be ascribed to the combined effects of large lattice distortion and high tetragonal phase content. These results demonstrate that constructing morphotropic phase boundaries via considering simultaneously the role of lattice distortion might be effective route to realize high-temperature and high piezoelectricity in BiFeO3 -based systems.