Characterisation of P(VDF-TrFE) material taking into account dielectric relaxation: application to modelling of high frequency transducers

被引：8

作者：

Levassort, F ^{[1
]}

Hue, LPTH ^{[1
]}

Feuillard, G ^{[1
]}

Lethiecq, M ^{[1
]}

机构：

[1] LUSSI, GIP Ultrasons, F-37032 Tours, France

来源：

ULTRASONICS | 1998年 / 36卷 / 1-5期

关键词：

material characterisation; piezoelectricity; dielectric relaxation; transducer;

D O I：

10.1016/S0041-624X(97)00081-4

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A piezoelectric copolymer has been characterised with a new method which takes into account the frequency dispersion by modelling the dielectric relaxation phenomenon in the material. The different steps of the characterisation are presented and experimental electromechanical values are given. These results are introduced into a modified K.L.M. scheme to model the electroacoustic response of a high frequency transducer integrating this copolymer. The simulations and experimental response are found to be in good agreement. The characteristics of the transducer have allowed to integrate it in a high resolution imaging system and image quality is evaluated for dermatologic applications. (C) 1998 Elsevier Science B.V.

引用

页码：41 / 45

页数：5

共 14 条

[1]

[Anonymous], 1987, IEEE Standard on Piezoelectricity, ANSI/IEEE Std 176

[2] ULTRASOUND TRANSDUCER MODELS FOR PIEZOELECTRIC POLYMER-FILMS [J].