Lead‐free piezoelectric 0.65Bi_1.05FeO₃–0.35BaTiO₃ (BF–35BT) ceramics are synthesized via conventional solid‐state reaction by varying sintering dwell time (t _s). 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 t _s 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 (P _r) and coercive field (E _c) is obtained. Typical ferroelectric behaviors are obtained, whereas unipolar and bipolar strains are enhanced with increasing t _s. The static piezoelectric constants (d ₃₃) = 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 (T _C) = 422 °C.

中文翻译：

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通过优化烧结条件增强了0.65Bi1.05FeO3-0.35BaTiO3陶瓷的机电性能

无铅压电0.65Bi _1.05 FeO ₃ –0.35BaTiO ₃（BF-35BT）陶瓷是通过改变烧结停留时间（t _s）的常规固态反应合成_的。在室温下评估BF-35BT的结晶相，微结构和压电性能。获得了在较小的t _s范围内具有改善的电性能的BF-35BT陶瓷。在1000°C烧结3 h的陶瓷中可获得增强的机电性能。X射线衍射显示具有伪立方对称性的单个钙钛矿结构。剩余极化强度（P _r）和矫顽场（E _c）。获得了典型的铁电行为，而单极性和双极性应变随t _s的增加而增强。静态压电常数（d ₃₃）= 187 pC N ^-1，而动态压电常数（d ^* ₃₃）= 387 pm V ^-1在5 kV mm ^-1的场上，居里温度（T _C）= 422°C 。