Chen Jianguo, Liu Guoxi, Cheng Jinrong, Dong Shuxiang
IEEE Trans Ultrason Ferroelectr Freq Control. 2016 Aug;63(8):1186-91. doi: 10.1109/TUFFC.2016.2569622. Epub 2016 May 17.
The actuation performance, strain hysteresis, and heat generation of the shear-bending mode actuators based on soft and hard BiScO3-PbTiO3 (BS-PT) ceramics were investigated under different thermal (from room temperature to 300 °C) and electrical loadings (from 2 to 10 kV/cm and from 1 to 1000 Hz). The actuator based on both soft and hard BS-PT ceramics worked stably at the temperature as high as 300 °C. The maximum working temperature of this shear-bending actuators is 150 °C higher than those of the traditional piezoelectric actuators based on commercial Pb(Zr, Ti)O3 materials. Furthermore, although the piezoelectric properties of soft-type ceramics based on BS-PT ceramics were superior to those of hard ceramics, the maximum displacement of the actuator based on hard ceramics was larger than that fabricated by soft ceramics at high temperature. The maximum displacement of the actuator based on hard ceramics was [Formula: see text] under an applied electric field of 10 kV/cm at 300 °C. The strain hysteresis and heat generation of the actuator based on hard ceramics was smaller than those of the actuator based on soft ceramics in the wide temperature range. These results indicated that the shear-bending actuator based on hard piezoelectric ceramics was more suitable for high-temperature piezoelectric applications.
研究了基于软硬铋层状结构铁电陶瓷（BiScO3-PbTiO3，BS-PT）的剪切弯曲模式致动器在不同热载荷（从室温到300°C）和电载荷（2至10 kV/cm以及1至1000 Hz）下的驱动性能、应变滞后和发热情况。基于软硬BS-PT陶瓷的致动器在高达300°C的温度下稳定工作。这种剪切弯曲致动器的最高工作温度比基于商用Pb(Zr,Ti)O3材料的传统压电致动器高150°C。此外，尽管基于BS-PT的软质陶瓷的压电性能优于硬质陶瓷，但在高温下基于硬质陶瓷的致动器的最大位移大于基于软质陶瓷制造的致动器。在300°C、10 kV/cm的外加电场下，基于硬质陶瓷的致动器的最大位移为[公式：见原文]。在较宽温度范围内，基于硬质陶瓷的致动器的应变滞后和发热小于基于软质陶瓷的致动器。这些结果表明，基于硬压电陶瓷的剪切弯曲致动器更适合高温压电应用。
