Improved ferroelectric properties of BiFeO3-based piezoelectric ceramics through morphotropic phase boundary construction |
| |
| Affiliation: | 1. School of Materials Science and Engineering, Changwon National University, Gyeongnam, 51140, Republic of Korea;2. School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom;3. Department of Physics, Islamia College, Peshawar, KP, Pakistan;4. Department of Robotics Engineering, DGIST, Daegu, 42988, Republic of Korea;5. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea;1. School of Advanced Materials Engineering, Changwon National University, Gyeongnam 641-773, Republic of Korea;2. Department of Physics, Changwon National University, Gyeongnam 641-773, Republic of Korea;1. Material Analysis and Research Laboratory, Department of Physics, NSUT, New Delhi 110078, India;2. Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India;1. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Anhui University of Technology), Ministry of Education, Ma''anshan 243002, PR China;2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Anhui University of Technology), Ministry of Education, Ma’anshan 243002, PR China;3. Center for Electron Microscopy, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China;1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, Guangxi 541004, PR China;2. School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, PR China |
| |
| Abstract: | The ceramic (1-x)BiFe0.985Sc0.015O3-xBaZr0.2Ti0.8O3 + 1mol% MnO2 (x = 0.20, 0.25, 0.30, 0.35) (BFS-xBZT) was synthesized using the traditional ceramic sintering method. The components of the ceramic were determined by constructing a morphotropic phase boundary (MPB) which consists of rhombohedral (R) and tetragonal (T) phases (0.24≤ x ≤ 0.26). With the accumulation of BZT content, relax behaviors were observed by dielectric properties measurements. At the MPB, the crystal structures of the R phase and T phase change abruptly. The distortion degree of the R phase increases, and the differences between a and c of the T phase decrease. An enhanced ferroelectricity Pr of ~27.8 μC/cm2 and apex piezoelectric coefficient d33 of 131 ± 4 pC/N are obtained near the MPB (x = 0.25), due to the R-T phase coexistence near room temperature. The results show that BFS-xBZT ceramics could be a candidate for lead-free piezoelectric ceramics at high operating temperatures. |
| |
| Keywords: | Phase structures Piezoelectric ceramics Morphotropic phase boundary |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
