Enhanced piezoelectric properties in BF-BT based lead-free ferroelectric ceramics for high-temperature devices |
| |
| Affiliation: | 1. School of Materials Science and Engineering, State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China;2. China Zhenhua Group Yunke Electmnics Co., Ltd., Guiyang, 550018, PR China;3. School of Optical and Electronic Information, Engineering Research Center for Functional Ceramics MOE, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, PR China;4. Shenzhen Research Institute of Central China Normal University, Shenzhen, 518000, PR China;5. Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, 71420, Viet Nam;6. Guangdong HUST Industrial Technology Research Institute, Dongguan, 523808, PR China;7. School of Mechanical Engineering, Dongguan University of Technology, Dongguan, 523808, PR China;8. Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani, 12120, Thailand;9. Central European Institute of Technology (CEITEC) Brno University of Technology, Czech Republic;10. Wenzhou Advanced Manufacturing Technology Research Institute of Huazhong University of Science and Technology, PR China;11. Inner Mongolia Metal Material Research Institute, Baotou, 014000, PR China |
| |
| Abstract: | Due to the high Curie temperature (TC), BiFeO3–BaTiO3 (BF-BT) ceramics have been broadly investigated in high-temperature piezoelectric devices. The piezoelectric constant is one of the most significant factors in determining the sensitivity and reliability of piezoelectric functional components. However, the poor piezoelectric constant (d33) of BF-BT ceramic has prevented the practical application of the material. In this work, we innovatively introduce the 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 (0.93NBT-0.07BT) component to 0.7BF-0.3BT ceramic, to build a morphotropic phase boundary (MPB) for enhancing d33. The XRD analysis shows that the (0.7BF-0.3BT)-x(0.93NBT-0.07BT) ceramics are still in the MPB region with R–PC phases coexistence, and exhibits a homogeneous solid solution. Moreover, the introduction of 0.93NBT-0.07BT ceramic suppresses the generation of defects and facilitates grain growth, thus enhancing piezoelectric property. In consequence, an optimum piezoelectricity d33 = 213 pC/N along with Tc～450 °C was obtained in (0.7BF-0.3BT)-0.01(0.93NBT-0.07BT). This research provides a new idea for the application of BF-BT ceramics in high-temperature piezoelectric devices. |
| |
| Keywords: | BF-BT Lead-free piezoelectric ceramic High Curie temperature Thermal stability |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
