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首页> 外文期刊>Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on >Piezoelectric-electrostrictive monolithic bi-layer composite flextensional actuator
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Piezoelectric-electrostrictive monolithic bi-layer composite flextensional actuator

机译：压电-电致伸缩单片双层复合弯曲执行机构

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摘要

We propose a new type of flextensional actuator comprised of an electromechanically active element which is a piezoelectric-electrostrictive monolithic bi-layer composite (PE-MBLC) capped by truncated thin brass sheets. The PE-MBLC contains equal amounts of 0.65{Pb(Mg1/3Nb2/3)O3}-0.35PbTiO3 and 0.9{Pb(Mg1/3Nb2/3)O3}-0.1PbTiO3 by volume, and is obtained by a co-sintering process. With applied Emax = 10 kV/cm unipolar drive, the maximum axial displacement (u33) produced by the uncapped and capped PEMBLC is 11 and 21 mum, respectively. The hysteresis in unipolar u33 at 0.5 Emax is 4.6% for the uncapped PE-MBLC, while that for the capped one is 11%. Under bipolar excitation, the maximum u33 for uncapped is 11.6 mum at +Emax and 6.6 mum at -Emax with an asymmetry factor (xi)of 1.75 for which u33 0 at +Emax but is smaller than the u33 at +Emax. The origins of the observed asymmetry in u33 are discussed in the context of symmetry superposition and deformation mechanics of the endcaps.
机译：我们提出了一种新型的由电动主动元件组成的屈伸致动器，该电动主动元件是由截断的黄铜薄板覆盖的压电-电致伸缩整体式双层复合材料（PE-MBLC）。 PE-MBLC按体积计包含等量的0.65 {Pb（Mg1 / 3Nb2 / 3）O3} -0.35PbTiO3和0.9 {Pb（Mg1 / 3Nb2 / 3）O3} -0.1PbTiO3，并通过共烧结获得处理。在施加的Emax = 10 kV / cm单极驱动器的情况下，无盖和带盖PEMBLC产生的最大轴向位移（u33）分别为11和21 mum。对于无盖PE-MBLC，单极u33在0.5 Emax处的磁滞为4.6％，而有上限的PE-MBLC的磁滞为11％。在双极激发下，未封端的最大u33在+ Emax处为11.6微米，在-Emax处为6.6微米，不对称因数（xi）为1.75，对于+ Emax处的u33 0，但小于+ Emax处的u33。 u33中观察到的不对称性的起源是在端盖的对称叠加和变形力学的背景下讨论的。

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