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

Volume

1

fYear

2001

fDate

2001

Firstpage

157

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2001 IEEE

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-7177-1

Type

conf

DOI

10.1109/ULTSYM.2001.991599

Filename

991599