High Electric-Induced Strain and Temperature-Dependent Piezoelectric Properties of 0.75BF–0.25BZT Lead-Free Ceramics
作者： Jianguo Chen , Jinrong Cheng
DOI: 10.1111/JACE.14003
关键词:
摘要: 0.75BiFeO3–0.25Ba(ZrxTi1−x) + 0.6 wt% MnO2 (0.75BF–0.25BZT) ceramics with Mn addition were prepared by the solid-state reaction method. The high-field strain and high-temperature piezoelectric properties of 0.75BF–0.25BZT studied. Introduction Zr in solid solutions decreased Curie temperature slightly, improved dielectric obviously. 0.75BZT–0.25BT reached maximum at content 10 mol%. Tc, constant e loss tanδ (1 kHz), d33, planner electromechanical coupling factor kp mol% 456°C, 650, 5%, 138 pC/N, 0.30, respectively. bipolar unipolar under an electric field 100 kV/cm up to 0.55% 0.265%, respectively, which comparable those BiScO3–PbTiO3 “soft” PZT-based ceramics. typical “butterfly”-shaped frequency-dependent peak-to-peak indicated that large high-field-induced may be due non-180° domain switching. Rayleigh analysis reflected resulted from enhanced extrinsic contribution doping. 0.75BF-0.25BZT was almost linear RT 200°C. These results promising candidates for lead-free actuators.
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