Thermally stable dynamic piezoelectricity in sandwich films of porous and nonporous amorphous fluoropolymer
- 17 September 2001
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 79 (12) , 1852-1854
- https://doi.org/10.1063/1.1404405
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 120 °C could make these polymer electret films interesting candidates for sensor and actuator applications in elevated temperature environments.Keywords
This publication has 6 references indexed in Scilit:
- Piezo- and pyroelectricity of a polymer-foam space-charge electretJournal of Applied Physics, 2001
- Large and broadband piezoelectricity in smart polymer-foam space-charge electretsApplied Physics Letters, 2000
- Porous PTFE space-charge electrets for piezoelectric applicationsIEEE Transactions on Dielectrics and Electrical Insulation, 2000
- Piezoelectricity of porous polytetrafluoroethylene single- and multiple-film electrets containing high charge densities of both polaritiesApplied Physics A, 2000
- Temperature dependence of elastic, dielectric, and piezoelectric properties of “single crystalline’’ films of vinylidene fluoride trifluoroethylene copolymerJournal of Applied Physics, 1997
- A direct current piezoelectric effect in fluorinated ethylene-propylene copolymer due to space chargeApplied Physics Letters, 1996