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弛豫铁电体-PbTiO₃ 单晶的面剪切压电特性。

Face shear piezoelectric properties of relaxor-PbTiO(3) single crystals.

作者信息

Zhang Shujun, Li Fei, Jiang Wenhua, Luo Jun, Meyer Richard J, Cao Wenwu, Shrout Thomas R

出版信息

Appl Phys Lett. 2011 May 2;98(18):182903. doi: 10.1063/1.3584851. Epub 2011 May 5.

Abstract

Poling relaxor-PbTiO(3) single crystals along pseudocubic [011] results in a macroscopic symmetry of mm2, enabling a large face shear d(36) in Zt±45° cut crystals. In order to allow the determination of electrical properties by the resonance method, square samples are required. Using Pb(In(0.5)Nb(0.5))O(3)-Pb(Mg(1∕3)Nb(2∕3))O(3)-PbTiO(3) crystals, piezoelectric d(36) coefficients were determined to be in the range of 2000-2500 pC∕N, with electromechanical coupling factor k(36)∼0.80-0.83. Mechanical quality factor Q∼180 and ultralow frequency constant of ∼500 Hz m were obtained. Together with the wide temperature usage range (up to ∼110 °C) and high ac driving field stability (∼5 kV∕cm), such face shear crystals have a promising potential for ultralow-frequency-transducer applications.

摘要

沿伪立方[011]方向极化弛豫铁电体-PbTiO₃单晶会产生mm2的宏观对称性,使得在Zt±45°切割的晶体中具有较大的面切变d₃₆。为了通过共振法测定电学性质,需要方形样品。使用Pb(In₀.₅Nb₀.₅)O₃-Pb(Mg₁∕₃Nb₂∕₃)O₃-PbTiO₃晶体,压电d₃₆系数测定值在2000 - 2500 pC∕N范围内,机电耦合因子k₃₆约为0.80 - 0.83。获得了机械品质因数Q约为180以及约500 Hz m的超低频常数。连同宽温度使用范围(高达约110°C)和高交流驱动场稳定性(约5 kV∕cm),这种面切变晶体在超低频换能器应用方面具有广阔的潜在前景。

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