Title :
Simple measurement method for determining surface acoustic wave velocities
Author :
Janin, Y. ; Feuillard, Guy ; Teston, F. ; Levassort, F. ; Lethiecq, M.
Author_Institution :
GIP Ultrasons, Tours, France
Abstract :
The acoustic wave velocity for the Rayleigh surface mode in piezoelectric material is determined from the measurement of the linearly interpolated phase delay between two surface acoustic wave (SAW) transducers. The phase term due to transduction is calculated and we show that its correction leads to an improvement of the measurement. The method is applied to a Y cut Z propagating lithium niobate single crystal, and two piezoceramics, a modified lead titanate piezoceramic, Pz34, and a lead zirconate titanate, Pz26. A velocity of 3486 m/s is found for lithium niobate which close to results published in literature. The method applied to ceramics gives respectively 2525 m/s and 2113 m/s for Pz34 and Pz26
Keywords :
Rayleigh waves; acoustic wave velocity measurement; lithium compounds; piezoceramics; piezoelectric materials; surface acoustic wave delay lines; surface acoustic wave transducers; surface acoustic waves; 2113 m/s; 2525 m/s; 3486 m/s; Li(Zr,Ti)O3; LiNbO3; LiTiO3; Pb(ZrTi)O3; PbTiO3; Pz26; Pz34; Rayleigh surface mode; SAW transducers; linearly interpolated phase delay; lithium niobate single crystal; modified lead titanate piezoceramic; piezoceramics; piezoelectric material; surface acoustic wave velocities; Acoustic measurements; Acoustic waves; Delay lines; Lithium niobate; Phase measurement; Piezoelectric materials; Propagation delay; Surface acoustic waves; Titanium compounds; Velocity measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE
Conference_Location :
Brussels
Print_ISBN :
0-7803-3312-8
DOI :
10.1109/IMTC.1996.507385
