Improving the power generation characteristics of piezoelectric energy harvesters requires the construction of piezoelectric ceramics with high transduction coefficient (d₃₃ × g₃₃), which remains a big challenge. In this paper, guided by piezoelectric energy harvester applications, the relationship between the composition, microstructure and transduction coefficient of (1 − x)BiScO₃–xPbTiO₃ material is systematically studied. The results demonstrated that the sample with a composition of x = 0.64 not only has a high Curie temperature (426 °C) which is beneficial to improve the working stability of the device, but also has a very high d₃₃ × g₃₃ value (15,110 × 10⁻¹⁵ m²/N), which is significantly superior to the commercial PZT system. Excellent electrical performance can be attributed to the fact that the composition of x = 0.64 located near MPB has a very high piezoelectric charge constant (505 pC/N) at the same time with moderate dielectric constant (1907). The cantilever-type energy harvester made of optimized composition generated a high output power density of 2.93 μW/mm³ at room temperature, which charged a commercial 47 μF electrolytic capacitor to 22 V in just 220 s and lighted up 72 LEDs for 0.1~0.2 s. Further, x = 0.64 harvester exhibited a large output voltage of 2.76 V even at 350 °C, suggesting its potential use for powering high temperature wireless sensors.

中文翻译：

---

高传输系数BiScO 3 -PbTiO 3压电陶瓷的构建及其发电特性

改善压电能量收集器的发电特性需要构造具有高传导系数（d ₃₃  ×  g ₃₃）的压电陶瓷，这仍然是一个很大的挑战。本文以压电能量收集器的应用为指导，系统地研究了（1- x）BiScO ₃ – x PbTiO ₃材料的组成，微观结构与转导系数之间的关系 。结果表明，组成为x的样品 = 0.64不仅具有较高的居里温度（426°C），有利于提高设备的工作稳定性，而且具有非常高的d ₃₃  ×  g ₃₃值（15,110×10 ^-15  m ² / N），这明显优于商用PZT系统。优异的电性能可以归因于以下事实： 位于MPB附近的x = 0.64的成分同时具有很高的压电电荷常数（505 pC / N）和适度的介电常数（1907）。由优化成分制成的悬臂式能量采集器产生了2.93μW/ mm ³的高输出功率密度在室温下，仅用220 s就可将商用的47μF电解电容器充电至22 V，并点亮72个LED 0.1至0.2 s。此外，x  = 0.64的收割机即使在350°C时也显示出2.76 V的大输出电压，这表明它有潜力为高温无线传感器供电。