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

• 作者: Xinjian WANG Yu HUAN Yixuan ZHU Peng ZHANG Wenlong YANG Peng LI Tao WEI Longtu LI Xiaohui WANG
• 来源期刊: 先进陶瓷（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Research Article
• 页码范围: 184-195
• 页数: 12页
• 语种: 英文

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.