| Autor: |
Tang W; School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China., Zhao X; School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China., Pan Z; State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China., Zeng Z; State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China., Wu H; School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China., Wang Y; State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China., Yang Y; State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China., Wang Y; Hangzhou Applied Acoustics Research Institute, Hangzhou 310023, China., Xiang G; Hangzhou Applied Acoustics Research Institute, Hangzhou 310023, China., Wang Y; School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China., Zhang ST; Nanjing University College of Engineering and Applied Sciences, Nanjing University, Nanjing 21093, China., Yuan G; School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. |
| Abstrakt: |
High-power piezoelectric ceramics typically operate under severe conditions. This makes the accurate evaluation of their high-power performances through pure quasi-static parameters challenging. The 0.94PbZr 0.5 Ti 0.5 O 3 - 0.06Pb(Mn 1/3 Nb 2/3 )O 3 + 0.005Fe 2 O 3 + 0.002Sc 2 O 3 (PZT-1) ceramic exhibits exceptional and reliable high-power performances at elevated temperatures and under loading conditions. While numerous PZT-based ceramics demonstrate excellent quasi-static parameters, only the PZT-1 ceramic displays superior high-field parameters, such as a low tan δ of 0.97% at 566 V/mm (1 kHz) and a large Q m of 1164 at 50 V/mm (100 kHz). Therefore, the PZT-1 ceramic demonstrates remarkably slow heat generation and the highest surface temperatures are only 41.8 °C at 50 V/mm (100 kHz). Moreover, the PZT-1 ceramic shows a minimal resonance frequency variation of -0.04% in the temperature range of 25-120 °C at 50 V/mm. Consequently, the PZT-1 ceramic maintains a high and reliable vibration velocity of 0.90 m/s at 120 °C for 30 min, and the ceramic cantilever sustains a high amplitude of 7 μm, significantly outperforming other ceramics. This study conclusively demonstrates that high-field parameters, rather than quasi-static parameters, are more effective in accurately estimating the high-power performances of ceramics. |
