采用准静态下具有共面电极结构的压电悬臂梁评估压电材料的机电耦合参数。
Evaluation of electromechanical coupling parameters of piezoelectric materials by using piezoelectric cantilever with coplanar electrode structure in quasi-stasis.
出版信息
IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Feb;61(2):369-75. doi: 10.1109/TUFFC.2014.6722621.
Based on Timoshenko beam theory, a principle model is proposed to establish the relationship between electric charge and excitation acceleration, and in quasi-stasis we apply the direct piezoelectric effect of multilayer cantilever with coplanar electrode structure to evaluate the piezoelectric strain coefficient d15 and electromechanical coupling coefficient k15. They are measured as 678 pC/N and 0.74 for the commercial piezoelectric ceramic lead zirconate titanate (PZT-51) bulk specimen and 656 pC/N and 0.63 for the lead magnesium niobate (PMN) bulk specimen, and they are in agreement with the calibration and simulation values. The maximum of relative errors is less than 4.2%, so the proposed method is reliable and convenient.
基于铁木辛柯梁理论，提出了一种原理模型来建立电荷与激励加速度之间的关系，并在准静态下应用共面电极结构的多层悬臂梁的直接压电效应来评估压电应变系数 d15 和机电耦合系数 k15。对于商用压电陶瓷锆钛酸铅（PZT-51）块状试样，测量值分别为 678 pC/N 和 0.74，对于镁铌酸铅（PMN）块状试样，测量值分别为 656 pC/N 和 0.63，与校准和模拟值一致。最大相对误差小于 4.2%，因此该方法可靠且方便。
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