Title :
Temperature characteristics of acoustic waves propagating in thin piezoelectric plates
Author :
Kuznetsova, I.E. ; Zaitsev, B.D. ; Joshi, S.G.
Author_Institution :
EECE Dept., Marquette Univ., Milwaukee, WI, USA
Abstract :
The temperature coefficient of delay (TCD) for lowest order plate wave modes, A0, S0, and SH0, in LiNbO 3 crystal has been calculated. In almost all cases investigated so far TCD is found to be a weak function of the normalized plate thickness h/λ (h=plate thickness, λ=acoustic wavelength). The only exception occurs for the A0 mode in X-Z and Y-Z plates. It is found that plate waves can provide higher K2 and lower TCD than is possible with SAWs. For example, for SH0 mode in X-Y+170° lithium niobate K2=0.29 and TCD=54 ppm/°C. Experimental measurements of TCD for SH0 waves in Y-X lithium niobate are found in good agreement with theory
Keywords :
lithium compounds; piezoelectric thin films; surface acoustic wave devices; surface acoustic waves; LiNbO3; SH0 mode; TCD; lowest order plate wave modes; normalized plate thickness; plate acoustic waves; temperature characteristics; thin piezoelectric plates; Acoustic measurements; Acoustic propagation; Acoustic waves; Dielectric constant; Lithium niobate; Piezoelectric devices; Piezoelectric materials; Propagation delay; Sawing machines; Temperature;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.991599
