Ultrahigh dielectric permittivity in oxide ceramics by hydrogenation.

ABSTRACT: Boosting dielectric permittivity representing electrical polarizability of dielectric materials has been considered a keystone for achieving scientific breakthroughs as well as technological advances in various multifunctional devices. Here, we demonstrate sizable enhancements of low-frequency dielectric responses in oxygen-deficient oxide ceramics through specific treatments under humid environments. Ultrahigh dielectric permittivity (~5.2 × 10⁶ at 1 Hz) is achieved by hydrogenation, when Ni-substituted BaTiO₃ ceramics are exposed to high humidity. Intriguingly, thermal annealing can restore the dielectric on-state (exhibiting huge polarizability in the treated ceramics) to the initial dielectric off-state (displaying low polarizability of ~10³ in the pris

SUBMITTER: Duong NX 

PROVIDER: S-EPMC9956132 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature