Measurement of the longitudinal effect and antiresonance characteristics of piezoelectric ceramics under large vibration levels

2021 Fiscal Year Final Research Report

• Project/Area Number: 17K06805
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Nagaoka National College of Technology
• Principal Investigator: Umeda Mikio 長岡工業高等専門学校, 電子制御工学科, 教授 (00342478)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Keywords: 電気的過渡応答法 / 圧電縦効果 / 高振動レベル / 簡易測定

Outline of Final Research Achievements

First, the several methods to measure the vibration level characteristics of the piezoelectric transducer under electrical antiresonance were tried, but good results were not obtained. Next, the vibration level characteristics of the piezoelectric longitudinal effect transducer under electrical resonance were measured and discussed in comparison with the piezoelectric transverse effect transducer. When the vibration velocity was used as parameter for the vibration level, the changes in various characteristics of the longitudinal effect transducer and the mechanical loss at the large vibration level were smaller than them of the transverse effect transducer.
Moreover, a simple method for measuring and calculating the characteristics under large vibration levels were proposed and examined. When compared with the results by the original electrical transient response method, the tendencies of the vibration level characteristics of some constants were nearly the same.

Free Research Field

圧電デバイス

Academic Significance and Societal Importance of the Research Achievements

電気的過渡応答法により電気的共振下での圧電縦効果振動子の振動レベル特性の測定が可能であることが確認されたことで，高振動レベルでも安定した特性を持つ圧電縦効果素子の開発が進むと考えられる。また，電気的共振下の高い振動速度領域では圧電横効果振動子に比べ圧電縦効果振動子のほうが特性変化や損失面で優位であることが確認されたことで，高振動レベル下での圧電縦効果振動子の応用が広がると予想される。
一方，高価な振動速度計を整備しなくともいくつかの定数の振動レベル特性の傾向を簡易的に測定することが可能であることが確認されたことで，高振動レベルに適した圧電材料の開発がより進むと考えられる。