Enhancing piezoelectric coefficient and thermal stability in lead-free piezoceramics: insights at the atomic-scale.

ABSTRACT: Given the highly temperature-sensitive nature of the polymorphic phase boundaries, attaining excellent piezoelectric coefficient with superior temperature stability in lead-free piezoceramics via direct compositional design remains a formidable challenge. We demonstrate the synergistic improvement of piezoelectric coefficient and thermal stability in lead-free piezoceramics via atomic-scale local ferroelectric structure design. Via modulation of the local Landau energy barrier at doping sites, we effectively mitigate fluctuations in piezoelectric d₃₃. Our approach achieves an impressive d₃₃ of ~430 pC/N with a minimal temperature fluctuation range (△d₃₃ ~ 7%) across the room temperature to 100 °C in potassium sodium niobate ceramics. Further optimization th

SUBMITTER: Zou J 

PROVIDER: S-EPMC11452656 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature