Piezoelectric Properties of BiFeO3 Exposed to High Temperatures
BiFeO3 is a ferroelectric with a Curie temperature of 830 C-degrees, however, its piezoelectric performance at high temperature remains unclear. The current work reveals a disappearance/recovery of piezoelectricity in BiFeO3 at elevated temperature and upon cooling. In particular, that temperature is strongly frequency-dependent and ranges from 280 to 430 C-degrees between 0.5 and 140 Hz, respectively. Meanwhile, in situ and ex situ X-ray diffraction and piezoresponse microscope analysis demonstrate thermally-resistant domain texture to temperatures as high as 750 C-degrees. This demonstrates that the piezoelectricity of BiFeO3 is strongly influenced by its resistance/conductance variations due to charge carrier motion limiting the operational frequency. The investigation enhances the understanding of BiFeO3 complex piezoelectric behavior at various temperatures, offering insights into its potential applications.
WOS:001147454600001
2024-01-23
REVIEWED
EPFL
Funder | Grant Number |
National Natural Science Foundation of China | |
Natural Science Foundation of Jiangsu Province, China | BK20210354 |
Fundamental Research Funds for the Central Universities | 30921011217 |
Young Elite Scientists Sponsorship Program by CAST | 2021-2023QNRC001 |
Peking university people's Hospital research and development funds | RDJP2022-44 |
Beijing natural science foundation | L222066 |
Slovenian Research and Innovation Agency | P2-0105 |
52102133 | |
52072178 | |
82202349 | |