Abstract A x BiScO 3 –(1- x - y )PbZrO 3 – y PbTiO 3 (denoted as x BS–(1- x - y )PZ– y PT) ternary piezoelectric system was prepared by combining BiScO 3 –PbTiO 3 and PbZrO 3 –PbTiO 3 for high-temperature applications. The morphotropic phase boundary region of the ternary system was identified by X-ray diffraction results together with piezoelectric and dielectric performance, which located at x = 0.054, y = 0.470; x = 0.072, y = 0.479; and x = 0.108, y = 0.492 composition intervals. Among all samples prepared, 0.072BS–0.449PZ–0.479PT displays the optimal piezoelectric and dielectric properties – piezoelectric coefficient d 33 of 426 pC/N, relative dielectric constant e r of 1703, electromechanical coupling factor k p of 0.55, and Curie temperature T c of 317 °C. Additionally, this composition exhibits excellent thermal stability over a broad temperature range. Within the temperature range of 40–200 °C (0.63 T c ), variations in k p , mechanical quality factor Q m , and e r are 16.7% (Δ k p / k p ), 14.8% (Δ Q m / Q m ), and 5.22/°C ( ∂ e / ∂ T ), respectively. The improved piezoelectric, dielectric properties and thermal stability is possibly attributed to the increasing number of irreversible non–180° domains that formed upon addition of BiScO 3 .

中文翻译：

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x BiScO 3 –(1- x - y )PbZrO 3 – y PbTiO 3 三元压电系统的热稳定性，具有增强的压电和介电性能

摘要 A x BiScO 3 –(1- x - y )PbZrO 3 – y PbTiO 3 (记为 x BS–(1- x - y )PZ– y PT) 通过结合 BiScO 3 –PbTiO 3 和PbZrO 3 –PbTiO 3 用于高温应用。X射线衍射结果与压电和介电性能一起确定了三元系统的同向相界区域，位于x = 0.054，y = 0.470；x = 0.072，y = 0.479；x = 0.108, y = 0.492 组合区间。在制备的所有样品中，0.072BS–0.449PZ–0.479PT 表现出最佳的压电和介电特性——压电系数 d 33 为 426 pC/N，相对介电常数 er 为 1703，机电耦合系数 kp 为 0.55，居里温度 T c 317°C。此外，这种组合物在很宽的温度范围内表现出优异的热稳定性。在 40–200 °C (0.63 T c ) 的温度范围内，kp 、机械品质因数 Q m 和 er 的变化为 16.7% (Δ kp / kp )、14.8% (Δ Q m / Q m )，和分别为 5.22/°C (∂e/∂T)。改进的压电、介电性能和热稳定性可能归因于在添加 BiScO 3 后形成的不可逆非 180° 域的数量不断增加。