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Measurement of the Second Order Elastic Constants of Langasite Crystals

[+] Author Affiliations
John A. Kosinski

MacAulay-Brown, Inc., Dayton, OH

Haifeng Zhang, Yuanye Bao

University of North Texas, Denton, Texas

Paper No. SMASIS2014-7752, pp. V001T01A035; 7 pages
doi:10.1115/SMASIS2014-7752
From:
  • ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring; Keynote Presentation
  • Newport, Rhode Island, USA, September 8–10, 2014
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4614-8
  • Copyright © 2014 by ASME

abstract

Langasite (LGS) has attracted considerable attention from researchers as a potential substrate material for piezoelectric device applications due to its very good frequency stability and moderately large electromechanical coupling factors for acoustic wave devices. This paper presents a new determination of the second order elastic constants of LGS using acoustic wave velocities measured by a time-of-flight cross-correlation method. Two types of ultrasonic transducers have been used to generate longitudinal and shear bulk waves that propagate through cube-shaped specimens. The specimens and attached transducers are placed inside a temperature chamber to maintain a constant environmental temperature during the measurements. We present a full comparison between the new values determined here and those previously reported.

Copyright © 2014 by ASME

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