Properties of transverse ultrasonic transducers of ferroelectric polymers working in thickness shear modes

Author

Omote, Kenji ; Ohigashi, Hiroji

Author_Institution

Dept. of Mater. Sci. & Eng., Yamagata Univ., Yonezawa, Japan

Volume

43

Issue

2

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

312

Lastpage

318

Abstract

Shear piezoelectric properties of poly(vinylidene fluoride) (PVDF) and copolymer of vinylidene fluoride and trifluoroethylene [P(VDF/TrFE)] have been studied precisely in a wide temperature range from 10 to 400 K. It was found that these polymers have the shear electromechanical coupling factors k/sub 15/ and k/sub 24/ large enough to be utilized for transverse ultrasonic transducers operating in a wide frequency range and in a wide temperature range below 400 K. Shear mode ultrasonic transducers of P(VDF/TrFE) were fabricated and their performances were studied both experimentally and theoretically. The shear polymer transducers are useful for generation and detection of transverse ultrasonic waves.

Keywords

ferroelectric devices; ferroelectric materials; ferroelectric thin films; piezoelectric materials; piezoelectric thin films; piezoelectric transducers; polymer blends; polymers; ultrasonic transducers; 10 to 400 K; P(VDF/TrFE); PVDF; copolymer; ferroelectric polymers; poly(vinylidene fluoride); shear electromechanical coupling factors; shear mode ultrasonic transducers; shear piezoelectric properties; shear polymer transducers; thickness shear modes; transverse ultrasonic transducers; transverse ultrasonic waves; trifluoroethylene; vinylidene fluoride; wide frequency range; wide temperature range; Electrodes; Ferroelectric materials; Frequency; Piezoelectric effect; Piezoelectric films; Piezoelectric transducers; Polymer films; Resonance; Temperature distribution; Ultrasonic transducers;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.485958

Filename

485958