Patterned piezoelectricity in charged, cellular polymers for air-borne ultrasound devices

Author

Hoislbauer, H. ; Schwödiauer, R. ; Bauer-Gogonea, S. ; Bauer, S.

Author_Institution

Dept. Appl. Phys., Johannes Kepler Univ., Linz, Austria

fYear

2002

fDate

2002

Firstpage

58

Lastpage

61

Abstract

Soft, flexible and sensitive piezoelectric materials are in demand for applications, like piezoelectric phased arrays for direction sensitive acoustic wave detection and emission. Here we report on air-borne ultrasound generation with novel piezoelectric polymers: charged, cellular polypropylene foams from VTT Chemical Technology. Based on polymer foams, two focusing devices have been developed and acoustically characterised: spherical acoustical sound generators and acoustical Fresnel zone plates. Both devices may pave the way for simple tools for non-destructive materials inspection.

Keywords

acoustic generators; foams; piezoelectric materials; piezoelectric transducers; polymers; ultrasonic focusing; ultrasonic transducers; zone plates; acoustical Fresnel zone plate; air-borne ultrasound device; charged cellular polymer; focusing device; nondestructive materials inspection; patterned piezoelectricity; polypropylene foam; spherical acoustical sound generator; Acoustic arrays; Acoustic signal detection; Acoustic waves; Chemical technology; Phase detection; Phased arrays; Piezoelectric materials; Piezoelectricity; Polymer foams; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on

Print_ISBN

0-7803-7560-2

Type

conf

DOI

10.1109/ISE.2002.1042943

Filename

1042943