Excellent piezoelectric performance of Bi-compensated 0.69BiFeO3-0.31BaTiO3 lead-free piezoceramics

This work focuses on the effects of Bi compensation on the phase structure, microstructure, ferroelectric, and piezoelectric performances of new 0.69Bi 1 +  x FeO 3 -0.31BaTiO 3 ( x , 0–0.08) piezoceramics fabricated by traditional sintering techniques. X-ray diffraction (XRD) results indicated that...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2021-09, Vol.32 (17), p.22637-22644
Main Authors: Yi, Wenbin, Lu, Zhenya, Liu, Xingyue, Huang, Du, Jia, Zhi, Chen, Zhiwu, Wang, Xin, Zhu, Huixiang
Format: Article
Language:English
Subjects:
Barium titanates
Characterization and Evaluation of Materials
Chemistry and Materials Science
Compensation
Densification
Ferroelectricity
Grain growth
Lead free
Materials Science
Optical and Electronic Materials
Photoelectrons
Piezoelectric ceramics
Piezoelectricity
Sintering
Solid phases
Spectrum analysis
Temperature
X ray photoelectron spectroscopy
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Summary:This work focuses on the effects of Bi compensation on the phase structure, microstructure, ferroelectric, and piezoelectric performances of new 0.69Bi 1 +  x FeO 3 -0.31BaTiO 3 ( x , 0–0.08) piezoceramics fabricated by traditional sintering techniques. X-ray diffraction (XRD) results indicated that Bi compensation has slight influences on the phase structure and all the ceramics locate near the morphotropic phase boundary of rhombehedral–pseudocubic phase coexistence. The rhombehedral phase fraction of all the ceramics fluctuates slightly in the range of 41.7–49.1 %. X-ray photoelectron spectroscopy (XPS) results confirmed that Bi compensation favors the decrease in the percentage of oxygen vacancy in the ceramics. An appropriate content of Bi compensation facilitates the densification, grain growth as well as enhancement of piezoelectric property of the materials. In addition, Bi compensation makes the materials “soft” along with the lower E C compared with the no compensation ceramics. Significantly, the excellent piezoelectric performance ( d 33  = 207 pC/N) was achieved in the 0.69Bi 1.04 FeO 3 -0.31BaTiO 3 ceramics, which is higher than the results obtained in the previously reported BiFeO 3 -BaTiO 3 -based ceramics. This work would trigger further study on the BiFeO 3 -BaTiO 3 -based piezoceramics for practical application.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-06748-y