Affiliation:
1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic Science and Engineering Xi'an Jiaotong University Xi'an P. R. China
2. Department of Materials Science and Engineering Sichuan University‐Pittsburgh Institute Sichuan University Chengdu Sichuan P. R. China
3. Suzhou Sicui Electronic Functional Material Technology Research Institute Co. Ltd. Suzhou Jiangsu P. R. China
Abstract
AbstractDielectric, ferroelectric, and piezoelectric properties of both random and textured Mn–PMN–PZT ceramics were characterized under uniaxial stress. Textured ceramics exhibit a large piezoelectric response under uniaxial pressure; the bias field piezoelectric constant is higher than 700 pC/N when pressure is below 50 MPa. Moreover, textured ceramics also show better depolarization resistance under uniaxial stress fields; overall, 30% of the origin performance will remain when stress approaches 200 MPa, but for random ceramics, it is only 10%. The ferroelectricity of both random and textured ceramics is suppressed by uniaxial compression. Ec, Pr, Ei, and dissipation energy all decrease with increasing uniaxial stress. In addition, phase‐field simulation was used to better understand the polarization‐changing effects on piezoelectric and dielectric performance. The uniaxial stress causes polarization rotation and increases the angle between polarization and the electric field, which is an important factor leading to the increase of the dielectric constant.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Ceramics and Composites