Heat treatment of ceramics is an important process to tailor the fine electromechanical properties. To explore the criteria for optimized heat treatment in a perovskite structure of (1–x)Bi_1.05FeO₃–xBaTiO₃ (BF–BT100x) system, the structural phase relation, ferroelectric and piezoelectric response of BF–BT36 and BF–BT40 ceramics prepared by furnace cooling (FC) and quenching process were investigated. The X-ray diffraction examination showed single pseudocubic perovskite structure for all the ceramics. The homogenous microstructure was obtained for all ceramics with relatively large grain size in the furnace cooled samples. Well saturated ferroelectric hysteresis loops and enhanced piezoelectric constant (d₃₃ = 97 pC/N) were achieved by quenching process. Dielectric curve of BF–BT36 showed large dielectric constant at its Curie temperature, however, BF–BT40 showed diffused relaxor-like dielectric anomalies. Quenched BF–BT36 samples showed typical butterfly like field induced strain curves, however negative strain decreased in BF–BT40 ceramics. From these investigated study, it is observed that BF–BT ceramics are very sensitive to the heat treatment process (furnace cooling and quenching) on the dielectric, electromechanical properties.

陶瓷的热处理是调整精细机电性能的重要过程。探索在（1– x）Bi _1.05 FeO ₃ – x BaTiO ₃（BF–BT100 x）系统，研究了通过炉冷（FC）和淬火工艺制备的BF–BT36和BF–BT40陶瓷的结构相关系，铁电和压电响应。X射线衍射检查显示所有陶瓷均具有单一假立方钙钛矿结构。在炉内冷却的样品中，对于所有具有较大晶粒尺寸的陶瓷，均获得了均匀的微观结构。良好的饱和铁电磁滞回线和增强的压电常数（d ₃₃ 通过淬灭过程获得= 97 pC / N）。BF–BT36的介电曲线在居里温度下显示出较大的介电常数，而BF–BT40则显示出散布的类似弛豫的介电异常。淬火的BF–BT36样品显示出典型的蝴蝶状场致应变曲线，但是BF–BT40陶瓷的负应变降低。从这些研究中可以看出，BF-BT陶瓷对介电，机电性能的热处理过程（炉冷却和淬火）非常敏感。