Large and broadband piezoelectricity in smart polymer-foam space-charge electrets

被引：149

作者：

Neugschwandtner, GS

Schwödiauer, R

Vieytes, M

Bauer-Gogonea, S

Bauer, S

Hillenbrand, J

Kressmann, R

Sessler, GM

Paajanen, M

Lekkala, J

机构：

[1] Johannes Kepler Univ, A-4040 Linz, Austria

[2] Tech Univ Darmstadt, Inst Electroacoust, D-64283 Darmstadt, Germany

[3] VTT Chem Technol, Sensor Mat, FIN-33101 Tampere, Finland

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 23期

关键词：

D O I：

10.1063/1.1331348

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Charged closed-cell microporous polypropylene foams are shown to exhibit piezoelectric resonance modes in the dielectric function, coupled with a large anisotropy in the electromechanical and elastic material properties. Strong direct and converse dynamic piezoelectricity with a piezoelectric d(33) coefficient of 140 pC/N at 600 kHz is identified. The piezoelectric d(33) coefficient exceeds that of the ferroelectric polymer polyvinylidene fluoride by a factor of 5 and compares favorably with ferroelectric ceramics. Applications of similar concepts should provide a broad class of easily fabricated "soft" piezoelectric materials. (C) 2000 American Institute of Physics. [S0003-6951(00)03050-3].

引用

页码：3827 / 3829

页数：3

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