Temperature independence of piezoelectric properties for high-performance BiFeO₃-BaTiO₃ lead-free piezoelectric ceramics up to 300 °C.

ABSTRACT: The temperature-dependence behaviors of ferroelectric, piezoelectric, k _p and electrical-field-induced strain were carefully evaluated for high-performance BiFeO₃-0.3BaTiO₃ (BF-0.3BT) ceramics. There results indicate, combined with Rayleigh analysis and temperature-dependence XRD and PFM, that the increase of strain and large signal with increasing the temperature from room temperature to 180 °C is related to the joint effect of intrinsic contribution (lattice expansion) and extrinsic contribution (domain switching). With further increasing the temperature to 300 °C, the large signal d ₃₃ and electrical-field-induced strain mildly decrease because of the increase of conductivity for BF-0.3BT ceramics. However, different from strain and large signal the small signal d ₃₃(E₀) and k _p exhibit excellent temperature stability behavior as the temperature increases from room temperature to 300 °C.

SUBMITTER: Zhu LF 

PROVIDER: S-EPMC9088175 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature