Thermally stable dynamic piezoelectricity in sandwich films of porous and nonporous amorphous fluoropolymer

Axel Mellinger, Michael Wegener, Werner Wirges, Reimund Gerhard-Multhaupt

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Porous amorphous fluoropolymer films of very low stiffness were produced by a solvent evaporation technique. Corona-charged sandwich films consisting of a porous and a nonporous layer exhibit piezoelectric thickness-extension resonances in their dielectric spectrum, through which the temperature dependence of their dynamic stiffness, coupling factor, and piezoelectric coefficient could be determined. Their strong piezoelectricity with coefficients of up to 600 pC/N at temperatures of at least 12O °C could make these polymer electret films interesting candidates for sensor and actuator applications in elevated temperature environments.

Original languageEnglish
Pages (from-to)1852-1854
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number12
DOIs
StatePublished - Sep 17 2001

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