Relaxor behaviors enhance piezoelectricity in lead-free BiFeO3-BaTiO3 ceramics incorporated with a tiny amount of Bi(Mg1/2Ti1/2)O3 near the morphotropic phase boundary
Source abstract
Abstract
Abstract The relaxor behaviors near the morphotropic phase boundary (MPB) can reduce the energy barrier for polarization rotation, which is an effective strategy to improve the piezoelectric properties of materials. In this work, the phase structure, microstructure, and piezoelectric properties of (0.69-x)Bi1.02FeO3-0.31BaTiO3-xBi(Mg1/2Ti1/2)O3 (0.00 ≤ x ≤ 0.08) ceramics were systematically studied. The addition of a tiny amount of Bi(Mg1/2Ti1/2)O3 was found to cause the phase to transform from R-phase-dominant ferroelectrics (FEs) to PC-phase-dominant relaxor ferroelectrics (RFEs). The dielectric and electrical data reveal that nonergodic relaxor ferroelectrics (NE-RFEs) near the MPB were favorable for domain switching, which contributed to the enhanced piezoelectric and electrostrain properties of d33 = 182 pC/N, TC = 475 °C, and S = 0.21% at x = 0.04. Finally, a model of domain growth induced by an electric field was proposed for FEs and NE-RFEs.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Dielectric materials and actuators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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