| Autor: |
Guo J; National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China. stzhang@nju.edu.cn., Yan MY; National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China. stzhang@nju.edu.cn., Yu HR; National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China. stzhang@nju.edu.cn., Zhang J; School of Materials Science and Engineering, Nanjing University of Science & Technology, Nanjing 210094, China. jizhang@njust.edu.cn., Yuan G; School of Materials Science and Engineering, Nanjing University of Science & Technology, Nanjing 210094, China. jizhang@njust.edu.cn., Zhang ST; National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China. stzhang@nju.edu.cn.; Nanjing University (Suzhou) High-tech Institute, Suzhou Industrial Park 215123, China. |
| Jazyk: |
angličtina |
| Zdroj: |
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2024 Oct 01; Vol. 53 (38), pp. 16054-16065. Date of Electronic Publication: 2024 Oct 01. |
| DOI: |
10.1039/d4dt02007c |
| Abstrakt: |
Piezoelectric ceramics with high electrical performances and high Curie temperature ( T c ) act as key materials for numerous electromechanical devices such as transducers and actuators. Herein, we report a systematic investigation on the crystal structure, microstructure and electrical properties of Sr and La co-doped Pb(Mg 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 ceramics with a low Pb(Mg 1/3 Nb 2/3 )O 3 content, namely, (Pb 1- y Sr y )(Mg 1/3 Nb 2/3 ) 0.07 Zr x Ti 0.93- x O 3 : z La. With an increase in the Zr content ( x value) from 0.49 to 0.53, its crystal structure evolved from a tetragonal phase to a rhombohedral phase, leading to not only a morphotropic phase boundary (MPB) at around x = 0.51 but also a monotonously decreasing T c . Meanwhile, a change in either the Sr- or La-doping content ( y and z values, respectively) in the range of y = 0.03-0.07 and z = 0.01-0.03 can slightly deviate the structure of MPB, resulting in a significant effect on its electrical properties. As the best results, the optimal composition of x = 0.51, y = 0.05, and z = 0.02 yielded peak electrical performance, with a related room temperature piezoelectric coefficient ( d 33 ) of 645 pC N -1 , remanent polarization ( P r ) of 33.5 μC cm -2 , coercive field ( E c ) of 8.6 kV cm -1 , and T c of 242 °C. Especially, its piezoelectric properties showed excellent temperature stability, and its d 33 value decreased by only 3% from room temperature to 150 °C. This work not only provides an alternative piezoelectric ceramic with outstanding electrical performance for industrial applications, but also reveals a comprehensive perspective on the composition-structure-property relationship of doped Pb[(Mg 1/3 Nb 2/3 ),Zr,Ti]O 3 , which is helpful for further work on piezoelectric ceramics. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
