Investigation of MnO2-doped (Ba, Ca)TiO3 lead-free ceramics for high power piezoelectric applications

Lei Chen, Huiqing Fan, Shujun Zhang

科研成果: 期刊稿件文章同行评审

48 引用 (Scopus)

摘要

x% mol MnO2-doped Ba0.925Ca0.075TiO3 ceramics (abbreviated as BCT-Mnx, x=0-1.5) were synthesized by conventional solid-state reaction method. The effects of MnO2 addition and (Ba+Ca)/Ti mole ratio (A/B ratio) on the microstructure and electrical properties of the ceramics were investigated. The internal bias filed Ei was determined from the asymmetrical polarization hysteresis loops and found to increase with the doping concentration of MnO2. High mechanical quality factors (Qm>1200) and low dielectric loss (tanδ<0.5%) were found in the BCT-Mn0.75 and BCT-Mn1.0 ceramics with Ei>3 kV/cm, meanwhile, the piezoelectric and electromechanical properties were found to decrease compared with the pure BCT, exhibiting a typical characteristic of “hard” behavior. Of particular interest is that the microstructure of BCT-Mn0.75 ceramics could be controlled by changing the A/B ratio, where enhanced piezoelectric coefficient d33 on the order of 190 pC/N was obtained in the BCT-Mn0.75 ceramics with A/B=1.01 due to its fine-grained microstructure, with yet high Qm, being on the order of 1000. The high d33 and Qm in MnO2-doped BCT ceramics make it a promising candidate for high power piezoelectric applications.

源语言英语
页(从-至)3568-3576
页数9
期刊Journal of the American Ceramic Society
100
8
DOI
出版状态已出版 - 8月 2017

指纹

探究 'Investigation of MnO2-doped (Ba, Ca)TiO3 lead-free ceramics for high power piezoelectric applications' 的科研主题。它们共同构成独一无二的指纹。

引用此