Effect of a complex piezoelectric coupling coefficient on the resonance and antiresonance frequencies of piezoelectric ceramics

Joseph Kelly, Arthur Ballato, Ahmad Safari

Research output: Contribution to conferencePaperpeer-review

8 Scopus citations

Abstract

The equations governing the observed behavior of piezoelectric materials are well established when the materials at hand have high acoustic Q, such as quartz, lithium tantalate, and other single crystal piezoelectrics. Recently, however, moderate loss piezoelectric ceramics have become of interest due to their high degree of electromechanical coupling, low cost, and ease of fabrication. In both bulk and thin film forms, ceramics exhibit excellent piezoelectric properties, but the techniques that are useful for calculating material constants for quartz are not accurate for polycrystalline high coupling ceramics primarily because of their lossy nature. Losses arise predominantly in three forms: conductivity, dielectric, and viscous. Ceramics have grain boundaries that lead to DC conduction losses. Dielectric losses become significant because of the inherently high dielectric constants of most piezoelectric ceramics. Acoustic losses arise due to the internal friction accompanying mechanical motion. In this study we investigate the effects of a lossy piezoelectric coupling coefficient on the equations determining the resonance and antiresonance frequencies of thickness mode ceramic plate resonators excited by thickness and lateral fields.

Original languageEnglish (US)
Pages825-828
Number of pages4
StatePublished - Dec 1 1996
EventProceedings of the 1996 10th IEEE International Symposium on Applications of Ferroelectrics, ISAF. Part 1 (of 2) - East Brunswick, NJ, USA
Duration: Aug 18 1996Aug 21 1996

Other

OtherProceedings of the 1996 10th IEEE International Symposium on Applications of Ferroelectrics, ISAF. Part 1 (of 2)
CityEast Brunswick, NJ, USA
Period8/18/968/21/96

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Effect of a complex piezoelectric coupling coefficient on the resonance and antiresonance frequencies of piezoelectric ceramics'. Together they form a unique fingerprint.

Cite this