Abstract
Lead‐free piezoelectric 0.65Bi1.05FeO3–0.35BaTiO3 (BF–35BT) ceramics are synthesized via conventional solid‐state reaction by varying sintering dwell time (ts). The crystalline phase, microstructures, and piezoelectric properties of BF–35BT are evaluated at room temperature. BF–35BT ceramics with improved electrical properties in a narrow range of ts are obtained. Enhanced electromechanical properties are obtained in ceramics sintered at 1000 °C for 3 h. X‐ray diffraction reveals a single perovskite structure with pseudocubic symmetry. A prominent enhancement in remanent polarization (Pr) and coercive field (Ec) is obtained. Typical ferroelectric behaviors are obtained, whereas unipolar and bipolar strains are enhanced with increasing ts. The static piezoelectric constants (d33) = 187 pC N−1, whereas dynamic piezoelectric constants (d*33) = 387 pm V−1 at a field of 5 kV mm−1 with Curie temperature (TC) = 422 °C.
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