Attenuation of acoustic normal modes in piezoelectric plates loaded by viscous liquids

Author

Anisimkin, Ivan V. ; Anisimkin, Vladimir I.

Author_Institution

Inst. of Radioeng. & Electron., Russian Acad. of Sci., Moscow

Volume

53

Issue

8

fYear

2006

Firstpage

1487

Lastpage

1492

Abstract

Attenuation alpha_n versus viscosity eta of adjacent liquid is measured for each normal mode n generated in 30 different plates of commercially available, piezoelectric crystals with thickness-to-wavelength ratio in the range h/lambda = 0.6-2.5. Two modes with an optimal combination of sensitivity (0.1 dB/mmmiddotcP), insertion loss (<35 dB), and stop-band rejection (>15 dB) are found in liquid-loaded 128degY, X + 90deg-LiNbO₃ with h/lambda = 1.67. Both modes are suited for viscosity measurements and other sensing tasks in viscous liquids. They have predominantly longitudinal displacement and large propagation velocity v_n about 15,000 m/s

Keywords

acoustic wave absorption; acoustic wave propagation; flow measurement; lithium compounds; piezoelectric materials; plates (structures); viscosity; viscosity measurement; 15E3 m/s; LiNbO₃; acoustic normal modes; insertion loss; piezoelectric crystals; piezoelectric plates; propagation velocity; stop-band rejection; thickness-to-wavelength ratio; viscosity; viscous liquids; Acoustic measurements; Acoustic sensors; Acoustic waves; Attenuation; Electrodes; Frequency; Insertion loss; Liquids; Testing; Viscosity;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.2006.1665106

Filename

1665106