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Investigating the frequency spectrum of mechanical quality factor for piezoelectric materials based on phenomenological model

机译：基于现象学模型的压电材料机械品质因数频谱研究

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摘要

Heat generation due to losses restricts piezoelectric materials from maintaining a high power density, which will further limit the miniaturization of piezoelectric devices. As an evaluation index of the loss level, the mechanical quality factor shows an opposite tendency with losses. The mechanical quality factor should therefore be evaluated. By new methods to determine the mechanical quality factor, the highest mechanical quality factor has been discovered within the working bandwidth other than the resonance and antiresonance frequencies, which is almost double the value at the resonance. In this study, the prime determinant of the maximum value has been experimentally investigated on the basis of the phenomenological model of the admittance phase. The investigation experimentally infers that the change in the tendency of the phase leads to the appearance of the maximum value. Thus, the new phenomenon is experimentally explained for the first time. (c) 2015 The Japan Society of Applied Physics
机译：由于损耗而产生的热量限制了压电材料保持高功率密度，这将进一步限制压电器件的小型化。作为损耗水平的评估指标，机械品质因数显示出与损耗相反的趋势。因此，应评估机械品质因数。通过确定机械品质因数的新方法，已在工作带宽内发现了最高的机械品质因数，这是共振和反共振频率以外的频率，这几乎是共振值的两倍。在这项研究中，已经根据导纳相的现象学模型对最大值的主要决定因素进行了实验研究。该研究从实验上推断出，相趋势的变化导致出现最大值。因此，首次通过实验对新现象进行了解释。 （c）2015年日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2015年第10期|101501.1-101501.6|共6页
  • 作者

    Shi Weijia; Zhao Hui; Ma Jie; Yao Yu; Uchino Kenji;

  • 作者单位

    Harbin Inst Technol, Sch Astronaut, Control & Simulat Ctr, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Astronaut, Control & Simulat Ctr, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Astronaut, Control & Simulat Ctr, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Astronaut, Control & Simulat Ctr, Harbin 150001, Peoples R China;

    Penn State Univ, Mat Res Inst, Int Ctr Actuators & Transducers, University Pk, PA 16802 USA;

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