Enhanced Actuation Performance and Reduced Heat Generation in Shear-Bending Mode Actuator at High Temperature
Enhanced Actuation Performance and Reduced Heat Generation in Shear-Bending Mode Actuator at High Temperature
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DOI：
10.1109/tuffc.2016.2569622
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发表时间：
2016-05
期刊：
影响因子：
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通讯作者：
Jianguo Chen;G. Liu;Jinrong Cheng;S. Dong
中科院分区：
文献类型：
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作者：
Jianguo Chen;G. Liu;Jinrong Cheng;S. Dong
研究了BiScO_3-Pb_2O_3(BS-PT)软、硬陶瓷材料在不同温度(从室温到300℃)和不同电载荷(从2~10kV/cm和1~1000 Hz)下的剪切弯曲模式致动器的驱动性能、应变滞后和产热特性。基于软硬BS-PT陶瓷的驱动器在高达300℃的温度下稳定工作，该剪切弯曲驱动器的最高工作温度比传统的基于商用铅(Zr，Ti)O_3材料的压电驱动器高150℃。此外，尽管BS-PT软基陶瓷的压电性能优于硬质陶瓷，但在高温下，硬质陶瓷基作动器的最大位移大于软基陶瓷的最大位移。在外加电场为10kV/cm、温度为300C时，硬质陶瓷致动器的最大位移为22μm。在较宽的温度范围内，硬质陶瓷致动器的应变滞后和产热均小于软质陶瓷致动器。这些结果表明，基于硬质压电陶瓷的剪切弯曲致动器更适合于高温压电应用。
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 22 μm 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.