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首页> 外文期刊>Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on >Bilayer piezoelectric/electrostrictive (P/E) dome unimorph
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Bilayer piezoelectric/electrostrictive (P/E) dome unimorph

机译：双层压电/电致伸缩（P / E）圆顶单片

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摘要

We present a new type of actuator named bilayer piezoelectric/electrostrictive dome unimorph (BIPEDU), fabricated by attaching a piezoelectric-electrostrictive monolithic bilayer composites (PE-MBLC) to a metal plate. Various ratios of piezoelectric/electrostrictive (P/E) volume percent were used to form PE-MBLC. It was found that d33eff and Keff in PE-MBLC follow the series 2-2 composite mixing rule. However, the measured results were slightly lower than those of the calculated values because of a large difference in dielectric displacement between piezoelectric and electrostrictive layers and because the electrostrictor acts as the resistor that impedes the domain switching in piezoelectric layer during poling. In addition, we have investigated the field-induced displacement in PE-MBLC and BIPEDU actuators. In comparison, the displacement of BIPEDU actuators was much higher than that of PE-MBLC actuators. This was attributed to the good quality of bonding between ceramic and metal, which contributed to the proper stress/force transfer, as well as the metal sheet, which acted as a flextentional structure for PE-MBLC to generate more axial displacement in BIPEDU actuators. The load dependence of displacement in BIPEDU was obtained. In addition, the BIPEDU showed high reliability during the displacement cyclic testing.
机译：我们提出了一种新型的执行器，称为双层压电/电致伸缩圆顶单压电晶片（BIPEDU），通过将压电-电致伸缩整体式双层复合材料（PE-MBLC）连接到金属板上制成。压电/电致伸缩（P / E）体积百分比的各种比率用于形成PE-MBLC。发现PE-MBLC中的d33eff和Keff遵循2-2系列复合混合规则。但是，由于压电层和电致伸缩层之间的介电位移差异较大，并且电致伸缩器充当阻碍极化过程中压电层中域切换的电阻器，因此测量结果略低于计算值。此外，我们还研究了PE-MBLC和BIPEDU执行器中的场致位移。相比之下，BIPEDU执行器的位移远高于PE-MBLC执行器的位移。这归因于陶瓷和金属之间的良好粘结质量，这有助于适当的应力/力传递，而金属板则充当了PE-MBLC的挠性结构，从而在BIPEDU执行器中产生了更大的轴向位移。得到了BIPEDU中位移的载荷依赖性。此外，BIPEDU在位移循环测试中显示出高可靠性。

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