Lead-free Zr-doped ceria ceramics with low permittivity displaying giant electrostriction.

ABSTRACT: Electrostrictors, materials developing mechanical strain proportional to the square of the applied electric field, present many advantages for mechanical actuation as they convert electrical energy into mechanical, but not vice versa. Both high relative permittivity and reliance on Pb as the key component in commercial electrostrictors pose serious practical and health problems. Here we describe a low relative permittivity (<250) ceramic, Zr_xCe_1-xO₂ (x < 0.2), that displays electromechanical properties rivaling those of the best performing electrostrictors: longitudinal electrostriction strain coefficient ~10^-16 m²/V²; relaxation frequency ≈ a few kHz; and strain ≥0.02%. Combining X-ray absorption spectroscopy, atomic-level

SUBMITTER: Varenik M 

PROVIDER: S-EPMC10646075 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature