Crystal Structures and Piezoelectric Properties of Quenched and Slowly-Cooled BiFeO₃-BaTiO₃ Ceramics.

ABSTRACT: The BiFeO₃-BaTiO₃ (BF-BT) ceramics were here prepared through the solid-state reaction of Bi₂O₃, Fe₂O₃ and nano-sized BT powders. The crystal structures and piezoelectric properties were investigated in both quenched (AQ) and slowly cooled (SC) 0.7BF-0.3BT ceramics. Prior work has shown that rhombohedral and pseudo-cubic phases coexist in 0.7BF-0.3BT ceramics. In this work, the crystal structure of the pseudo-cubic phase was refined as a non-polar orthorhombic Pbnm phase in the SC sample and as a polar orthorhombic Pmc2₁ phase in the AQ sample. In addition to a sharp dielectric peak at about 620 °C, corresponding to the Curie temperature of the rhombohedral phase, a broad dielectric peak with strong frequency disp

SUBMITTER: Go SH 

PROVIDER: S-EPMC11432820 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature