@article{AltafimRychkovWirgesetal.2012,
  author    = {Altafim, Ruy Alberto Pisani and Rychkov, Dmitry and Wirges, Werner and Gerhard, Reimund and Basso, Heitor Cury and Altafim, Ruy Alberto Pisani and Melzer, Martin},
  title     = {Laminated tubular-channel ferroelectret systems from low-density Polyethylene Films and from Fluoroethylene-propylene Copolymer Films - A comparison},
  series = {IEEE transactions on dielectrics and electrical insulation},
  volume    = {19},
  journal   = {IEEE transactions on dielectrics and electrical insulation},
  number    = {4},
  publisher = {Inst. of Electr. and Electronics Engineers},
  address   = {Piscataway},
  issn      = {1070-9878},
  pages     = {1116 -- 1123},
  year      = {2012},
  abstract  = {A template-based lamination technique for the manufacture of ferroelectrets from uniform electret films was recently reported. In the present work, this technique is used to prepare similar ferroelectret structures from low-density polyethylene (LDPE) films and from fluoro-ethylene-propylene (FEP) copolymer films. A comparative analysis of the pressure-, temperature-, and frequency-dependent piezoelectric properties has been performed on the two ferroelectret systems. It is observed that the FEP ferroelectrets exhibit better piezoelectric responses and are thermally more stable. The difference between the piezoelectric d(33) coefficients of the two ferroelectret systems is partially explained here by their different elastic moduli. The anti-resonance peaks of both structures have been investigated by means of dielectric resonance spectroscopy and electroacoustic sound-pressure measurements. A difference of more than 10 kHz is observed between the anti-resonance frequencies of the two ferroelectret systems.},
  language  = {en}
}