Controlled inflation of voids in cellular polymer ferroelectrets: Optimizing electromechanical transducer properties

M. Wegener; W. Wirges; R. Gerhard-Multhaupt; M. Dansachmüller; R. Schwödiauer; S. Bauer-Gogonea; S. Bauer; Mika Paajanen; Hannu Minkkinen; Jaakko Raukola

doi:10.1063/1.1641171

Controlled inflation of voids in cellular polymer ferroelectrets: Optimizing electromechanical transducer properties

M. Wegener (Corresponding Author), W. Wirges, R. Gerhard-Multhaupt, M. Dansachmüller, R. Schwödiauer, S. Bauer-Gogonea, S. Bauer, Mika Paajanen, Hannu Minkkinen, Jaakko Raukola

Research output: Contribution to journal › Article › Scientific › peer-review

141 Citations (Scopus)

Abstract

When exposed to sufficiently high electric fields, polymer-foam electret materials with closed cells exhibit ferroelectric-like behavior and may therefore be called ferroelectrets. In cellular ferroelectrets, the influence of the cell size and shape distributions on the application-relevant properties is not yet understood. Therefore, controlled inflation experiments were carried out on cellular polypropylene films, and the resulting elastical and electromechanical parameters were determined. The elastic modulus in the thickness direction shows a minimum with a corresponding maximum in the electromechanical transducer coefficient. The resonance frequency shifts as a function of the elastic modulus and the relative density of the inflated cellular films. Therefore, the transducer properties of cellular ferroelectrets can be optimized by means of controlled inflation.

Original language	English
Pages (from-to)	392 - 394
Number of pages	3
Journal	Applied Physics Letters
Volume	84
Issue number	3
DOIs	https://doi.org/10.1063/1.1641171
Publication status	Published - 2004
MoE publication type	A1 Journal article-refereed

Keywords

polymer foams
polymer films
thin films
ferroelectric thin films
electrets
elastic moduli
dielectric resonance
piezoelectric transducers

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10.1063/1.1641171

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title = "Controlled inflation of voids in cellular polymer ferroelectrets: Optimizing electromechanical transducer properties",

abstract = "When exposed to sufficiently high electric fields, polymer-foam electret materials with closed cells exhibit ferroelectric-like behavior and may therefore be called ferroelectrets. In cellular ferroelectrets, the influence of the cell size and shape distributions on the application-relevant properties is not yet understood. Therefore, controlled inflation experiments were carried out on cellular polypropylene films, and the resulting elastical and electromechanical parameters were determined. The elastic modulus in the thickness direction shows a minimum with a corresponding maximum in the electromechanical transducer coefficient. The resonance frequency shifts as a function of the elastic modulus and the relative density of the inflated cellular films. Therefore, the transducer properties of cellular ferroelectrets can be optimized by means of controlled inflation.",

keywords = "polymer foams, polymer films, thin films, ferroelectric thin films, electrets, elastic moduli, dielectric resonance, piezoelectric transducers",

author = "M. Wegener and W. Wirges and R. Gerhard-Multhaupt and M. Dansachm{\"u}ller and R. Schw{\"o}diauer and S. Bauer-Gogonea and S. Bauer and Mika Paajanen and Hannu Minkkinen and Jaakko Raukola",

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doi = "10.1063/1.1641171",

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TY - JOUR

T1 - Controlled inflation of voids in cellular polymer ferroelectrets

T2 - Optimizing electromechanical transducer properties

AU - Wegener, M.

AU - Wirges, W.

AU - Gerhard-Multhaupt, R.

AU - Dansachmüller, M.

AU - Schwödiauer, R.

AU - Bauer-Gogonea, S.

AU - Bauer, S.

AU - Paajanen, Mika

AU - Minkkinen, Hannu

AU - Raukola, Jaakko

N1 - Project code: D1SU00565

PY - 2004

Y1 - 2004

N2 - When exposed to sufficiently high electric fields, polymer-foam electret materials with closed cells exhibit ferroelectric-like behavior and may therefore be called ferroelectrets. In cellular ferroelectrets, the influence of the cell size and shape distributions on the application-relevant properties is not yet understood. Therefore, controlled inflation experiments were carried out on cellular polypropylene films, and the resulting elastical and electromechanical parameters were determined. The elastic modulus in the thickness direction shows a minimum with a corresponding maximum in the electromechanical transducer coefficient. The resonance frequency shifts as a function of the elastic modulus and the relative density of the inflated cellular films. Therefore, the transducer properties of cellular ferroelectrets can be optimized by means of controlled inflation.

AB - When exposed to sufficiently high electric fields, polymer-foam electret materials with closed cells exhibit ferroelectric-like behavior and may therefore be called ferroelectrets. In cellular ferroelectrets, the influence of the cell size and shape distributions on the application-relevant properties is not yet understood. Therefore, controlled inflation experiments were carried out on cellular polypropylene films, and the resulting elastical and electromechanical parameters were determined. The elastic modulus in the thickness direction shows a minimum with a corresponding maximum in the electromechanical transducer coefficient. The resonance frequency shifts as a function of the elastic modulus and the relative density of the inflated cellular films. Therefore, the transducer properties of cellular ferroelectrets can be optimized by means of controlled inflation.

KW - polymer foams

KW - polymer films

KW - thin films

KW - ferroelectric thin films

KW - electrets

KW - elastic moduli

KW - dielectric resonance

KW - piezoelectric transducers

U2 - 10.1063/1.1641171

DO - 10.1063/1.1641171

M3 - Article

SN - 0003-6951

VL - 84

SP - 392

EP - 394

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

ER -

Controlled inflation of voids in cellular polymer ferroelectrets: Optimizing electromechanical transducer properties

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Keywords

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