The influence of the conductivity of a liquid contacting with a piezoelectric resonator with a lateral electric field based on a PZT piezoceramic plate was experimentally and theoretically investigated. In this resonator the shear component of the mechanical displacement, which does not lead to radiation losses upon contact with the liquid, was prevalent. The frequency dependences of the real and imaginary parts of the electrical impedance of the resonator in the frequency range 50-300 kHz showed the presence of three resonances at frequencies of 68.7, 97.8 and 264 kHz with the values of the electro-mechanical coupling coefficient of 12.2%, 14.7% and 6.5%, respectively. The quality factor of each resonance in contact with the liquid turned out to be significantly higher than the quality factor of the resonator with a longitudinal acoustic wave based on lithium niobate. The dependences of the maximum value of the real part of the electrical impedance of such a resonator on the conductivity of the liquid for each resonance were obtained. This experimental data turned out to be in a good agreement with theoretical results obtained by using the method of equivalent circuit.

中文翻译：

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基于PZT陶瓷的横向电场激发谐振器与液体接触的电导率对其特性的影响

通过实验和理论研究了液体与具有基于 PZT 压电陶瓷板的横向电场的压电谐振器接触的电导率的影响。在这个谐振器中，机械位移的剪切分量在与液体接触时不会导致辐射损失，是普遍存在的。谐振器电阻抗实部和虚部在 50-300 kHz 频率范围内的频率依赖性表明，在 68.7、97.8 和 264 kHz 频率下存在三个谐振，机电耦合系数值为分别为 12.2%、14.7% 和 6.5%。与液体接触的每个共振的品质因数明显高于基于铌酸锂的具有纵向声波的共振器的品质因数。获得了这种谐振器的电阻抗实部最大值对每个谐振的液体电导率的依赖性。结果表明，该实验数据与使用等效电路法得到的理论结果吻合良好。