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Research Article | Open Access

Defect engineering of BCZT-based piezoelectric ceramics with high piezoelectric properties

Xinjian WANG1, Yu HUAN1( ), Yixuan ZHU1, Peng ZHANG1, Wenlong YANG1, Peng LI2, Tao WEI1, Longtu LI3, Xiaohui WANG3
School of Material Science and Engineering, University of Jinan, Jinan 250022, China
School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Abstract

The intrinsic conduction mechanism and optimal sintering atmosphere of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) ceramics were regulated by Mn-doping element in this work. By Hall and impedance analysis, the undoped BCZT ceramics exhibit a typical n-type conduction mechanism, and the electron concentration decreases with the increasing oxygen partial pressure. Therefore, the undoped ceramics exhibit best electrical properties (piezoelectrical constant d33 = 585 pC·N-1, electro-mechanical coupling factor kp = 56%) in O2. A handful of Mn-doping element would transfer the conduction mechanism from n-type into p-type. And the hole concentration reduces with the decreasing oxygen partial pressure for Mn-doped BCZT ceramics. Therefore, the Mn-doped ceramics sintered in N2 have the highest insulation resistance and best piezoelectric properties (d33 = 505 pC·N-1, kp = 50%). The experimental results demonstrate that the Mn-doping element can effectively adjust the intrinsic conduction mechanism and then predict the optimal atmosphere.

Keywords

defect engineeringBCZT ceramicsMn-dopingdifferent sintering atmospherep/n-type conduction mechanism

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Journal of Advanced Ceramics
Volume 11 Issue 1,
January 2022
Pages 184-195
DOI: 10.1007/s40145-021-0526-6
Cite this article:
WANG X, HUAN Y, ZHU Y, et al. Defect engineering of BCZT-based piezoelectric ceramics with high piezoelectric properties. Journal of Advanced Ceramics, 2022, 11(1): 184-195. https://doi.org/10.1007/s40145-021-0526-6

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Received: 11 June 2021
Revised: 25 July 2021
Accepted: 09 August 2021
Published: 24 December 2021
© The Author(s) 2021.

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