BiFeGaO₃-BaTiO₃ (BFG-BT) based ceramics with a large piezoelectric coefficient are potential high performance lead-free piezoelectric compounds. In this work, textured and random BFG-BT ceramics were realized by the solid state reaction method with and without BaTiO₃ (BT) templates. Textured ceramics were obtained by a reactive templated grain growth (RTGG) method leading to a high-temperature electromechanical strain of S = 0.27 % at 40 kV/cm and to an effective piezoelectric coefficient (d₃₃*) up to 685 pm/V at 180 °C. The easy movement of oriented domains enhanced the electromechanical strain under an applied electric field in textured sample (Lotgering factor f = 66.3 %). Structural investigations reveal that the proportion and degree of distortion of BFG-BT rhombohedral phase (R3c) reached its maximum in textured ceramics, resulting in large ferrodistortive displacements under electric fields. In addition, the dense nanodomains with low domain wall energies, inferred from the high-resolution transmission electron microscope (HR-TEM) observations, contribute to the extra displacement of the textured sample under an applied electric field. In textured ceramics, the remnant polarization was stable (about 17 μC/cm²) from room temperature to 180 °C, contributing to the stable ferroelectric property at high temperatures. Through the introduction of BT templates, high-density nanodomains were formed and the Burns temperature was enhanced in textured ceramics. The electromechanical strain, polarization and dielectric behavior were correlated to the textured or random forms of the BFG-BT based ceramics.

具有高压电系数的BiFeGaO ₃ -BaTiO ₃（BFG-BT）基陶瓷是潜在的高性能无铅压电化合物。在这项工作中，通过有和没有BaTiO ₃（BT）模板的固态反应方法实现了网状的无规BFG-BT陶瓷。通过反应模板生长（RTGG）方法获得纹理化陶瓷，从而在40 kV / cm时产生S = 0.27％的高温机电应变，并在685 pm / V时产生高达685 pm / V的有效压电系数（d ₃₃ *）。 180℃。定向畴的容易移动增强了结构化样品在外加电场下的机电应变（Lotgering因子f= 66.3％）。结构研究表明，网纹陶瓷中BFG-BT菱面体相（R 3c）的变形比例和变形程度达到最大值，从而在电场作用下产生大的铁畸变位移。此外，从高分辨率透射电子显微镜（HR-TEM）观察结果推断，具有低畴壁能量的致密纳米畴，有助于在施加电场的情况下纹理化样品的额外位移。在纹理陶瓷中，残余极化稳定（约17μC/ cm ²）从室温到180°C，有助于在高温下保持稳定的铁电性能。通过引入BT模板，形成了高密度纳米域，并提高了纹理陶瓷的烧伤温度。机电应变，极化和介电行为与BFG-BT基陶瓷的织构或随机形式相关。