Bimodal-Structured 0.9KNbO₃-0.1BaTiO₃ Solid Solutions with Highly Enhanced Electrocaloric Effect at Room Temperature.

ABSTRACT: 0.9KNbO₃-0.1BaTiO₃ ceramics, with a bimodal grain size distribution and typical tetragonal perovskite structure at room temperature, were prepared by using an induced abnormal grain growth (IAGG) method at a relatively low sintering temperature. In this bimodal grain size distribution structure, the extra-large grains (~10-50 μm) were evolved from the micron-sized filler powders, and the fine grains (~0.05-0.35 μm) were derived from the sol precursor matrix. The 0.9KNbO₃-0.1BaTiO₃ ceramics exhibit relaxor-like behavior with a diffused phase transition near room temperature, as confirmed by the presence of the polar nanodomain regions revealed through high resolution transmission electron microscope analyses. A large room-temperature electrocalori

SUBMITTER: Zhang H 

PROVIDER: S-EPMC9370179 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature