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

Journal of Advanced Ceramics

Yixuan Zhu¹  Peng Zhang¹  Yu Huan¹  Xinjian Wang¹  Wenlong Yang¹  Tao Wei¹  Peng Li²  Longtu Li³  Xiaohui Wang³ 

[1]School of Material Science and Engineering, University of Jinan, 250022, Jinan, China

[2]School of Materials Science and Engineering, Liaocheng University, 252000, Liaocheng, China

[3]State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China

关键词: BCZT ceramics;    Mn-doping;    different sintering atmosphere;    p/n-type conduction mechanism;    defect engineering;   

DOI  :  10.1007/s40145-021-0526-6

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY