摘要
高质量的压电换能器需要具备较高的机电耦合系数和灵敏度。该文在传统型1-3-2压电复合材料的基础上提出了一种改进型1-3-2压电材料,提高了压电换能器的机电耦合系数和换能器的接收灵敏度。通过有限元仿真分析了不同间距对改进型1-3-2压电材料敏感元件的谐振频率、反谐振频率及机电耦合系数的影响,并与传统1-3-2型压电复合材料进行了对比。结果表明,与传统型1-3-2压电复合材料相比,在相同间距条件下,改进型压电材料的机电耦合系数约大0.03。制做的3种不同间距改进型压电材料表明,间距为1 mm的改进型压电材料的机电耦合系数较大,约为0.68。
High-quality piezoelectric transducers require high electromechanical coupling coefficients and sensitivity.Based on the conventional 1-3-2 type piezoelectric composite material,an improved 1-3-2 type piezoelectric material is proposed to enhance the electromechanical coupling coefficient and receiving sensitivity of the piezoelectric transducer.The effects of different spacings on the resonance frequency,anti-resonance frequency,and electromechanical coupling coefficient of the sensitive elements of the improved 1-3-2 piezoelectric material are analyzed by finite-element simulation and compared with those of the traditional 1-3-2 piezoelectric composite material.The results show that the electromechanical coupling coefficient of the improved piezoelectric material is larger than that of the traditional 1-3-2 piezoelectric composite material with same spacing by approximately 0.03.Three improved piezoelectric materials with different spacings were fabricated.The results show that the improved piezoelectric material with a spacing of 1 mm has a large electromechanical coupling coefficient of about 0.68.
作者
井苏杰
于肇贤
王宏伟
JING Sujie;YU Zhaoxian;WANG Hongwei(College of Science,Beijing University of Information Science and Technology,Beijing 100192,China)
出处
《压电与声光》
CAS
北大核心
2024年第2期223-226,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(61771060)
北京市教委科研计划科技重点基金资助项目(KZ202111232050)。
关键词
不同间距
1-3-2型压电复合材料
改进型
谐振频率
反谐振频率
机电耦合系数
different spacing 1-3-2 type piezoelectric composite material
improved type
resonant frequency
anti-resonant frequency
electromechanical coupling coefficient
