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Updated: Jun 23, 2026

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
Published on: April 27, 2016
Temperature study of potassium niobate (KNbO(3)) elastic constants by Brillouin spectroscopy
Julien Eschbach1, Brice Vincent, Didier Rouxel
1Laboratoire de Physique des Milieux Ionisés, Boulevard des Aiguillettes, BP 239, 54506 Vandoeuvre-les-Nancy Cedex, France.
Abstract:
This study deals with using Brillouin spectroscopy to determine the temperature variation of potassium niobate elastic constants. Two different samples have been used (Y- and Z-cut), and all the measurements were done in the temperature range between 300 K and 420 K. The calculations concern only the first-order coefficients. The acoustic velocity is then determined for each sample in 3 directions of propagation. Results are given for C( 22), C( 55), and C( 66) elastic constants and accuracy problems are discussed.
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