The Bulk Acoustic Wave Properties of Lithium Tetraborate

Abstract

Lithium tetraborate is a new piezoelectric material which has been shown to have improved properties for SAW applications. In view of this the bulk acoustic wave properties have been predicted for both singly and doubly rotated cuts, using the values of the material constants and their temperature coefficients currently available. One of the orientations investigated showed potentially interesting properties. An X2-cut rotated 56 degrees 40' about X1 displayed a zero room temperature first order temperature coefficient of frequency for the thickness shear mode. Although there is strong coupling to a thickness extensional mode this is well separated out in frequency and the response is effectively single moded. The piezoelectric coupling constant for the thickness shear mode was predicted to be the greater than 6%, comparing favourably with AT quartz (0.8%) and 28% rotated berlinite (3%).

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1983
Accession Number
ADP002465

Entities

People

  • C. D. Emin
  • J. F. Werner

Organizations

  • General Electric

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Waves
  • Capacitance
  • Communication Systems
  • Crystal Structure
  • Equations
  • Frequency
  • Lithium Tantalates
  • Losses
  • Materials
  • Measurement
  • Piezoceramics
  • Piezoelectric Crystals
  • Resonance
  • Resonant Frequency
  • Surface Acoustic Waves
  • Temperature Coefficients
  • Vibration

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Materials Science and Engineering.
  • Microwave Engineering.