TY  - JOUR
A1  - Künstler, Wolfgang
A1  - Gerhard, Reimund
T1  - Charge profiles in corona- or electrode-charged fluoropolymers
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Wegener, Michael
A1  - Wirges, Werner
A1  - Richter, Kristin
A1  - Künstler, Wolfgang
A1  - Gerhard, Reimund
T1  - Charge stability and piezoelectric properties of porous fluoro-polymer space-charge electrets in layer systems
Y1  - 2001
ER  - 
TY  - BOOK
A1  - Hinrichsen, G.
A1  - Rabe, J. P.
A1  - Künstler, Wolfgang
ED  - Gerhard, Reimund
T1  - European Conference on Macromolecular Physics : molecular orientation in polymers ; generation, characterisation, application
T3  - Europhysics conference abstracts
Y1  - 1999
VL  - 23H
PB  - European Physical Society
CY  - Geneva [u.a.]
ER  - 
TY  - JOUR
A1  - Wegener, Michael
A1  - Künstler, Wolfgang
A1  - Richter, Kristin
A1  - Gerhard, Reimund
T1  - Ferroelectric polarization in stretched piezo- and pyroelectric poly(vinylidene fluoride-hexafluoropropylene) copolymer films
Y1  - 2002
ER  - 
TY  - JOUR
A1  - Gerhard, Reimund
A1  - Künstler, Wolfgang
A1  - Eberle, G.
A1  - Eisenmenger, E.
A1  - Yang, G. M.
T1  - High space densities in the bulk of fluoropolymer elctrets detected with piezoelectrically generated pressure steps
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Xia, Zhongfu
A1  - Gerhard, Reimund
A1  - Künstler, Wolfgang
A1  - Wedel, Armin
A1  - Danz, Rudi
T1  - High surface-charge stability of porous polytetrafluoroethylene electret films at room and elvated temperatures
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Gerhard, Reimund
A1  - Wegener, Michael
A1  - Künstler, Wolfgang
A1  - Wirges, Werner
A1  - Görne, Thomas
A1  - Urayama, D.
A1  - Neher, Dieter
T1  - Inverse piezoelectricity of porous PTFE films with bipolar space charge
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Wegener, Michael
A1  - Künstler, Wolfgang
A1  - Gerhard, Reimund
T1  - Piezo-, pyro- and ferroelectricity in poly (vinylidene fluoride-hexafluoropropylene) copolymer films
N2  - Thin films of poly(vinylidene fluoride-hexafluoropropylene) P(VDF-HFP) show significant electroactive properties, such as piezoelectricity, pyroelectricity and electrostriction. Suitable polar P(VDF-HFP) copolymer films can be prepared by melt-pressing or solution-casting. Dipolar orientation causes the macroscopic polarization and thus also the symmetry breaking necessary for electroactive properties. We discuss the polarization build-up in thin, stretched and non-stretched, films of P(VDF-HFP) copolymer with a HFP content of 15%. Poling currents measured in-situ during electric poling are analyzed and the polarization is calculated. Suitable electric poling leads to hysteresis phenomena of the polarization as a function of the electric field as well as to significant polarization during switching experiments. Our results indicate dipolar orientation also in non-stretched P(VDF-HFP) films
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Zhong-Fu, X.
A1  - Shan-Shan, M.
A1  - Jia-Qian, Z.
A1  - Xun-Lin, Q.
A1  - Ye-Wen, Z.
A1  - Gerhard, Reimund
A1  - Künstler, Wolfgang
T1  - Piezoelectric activity and its stability of polytetrafluoroethylene (PTFE) films
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Künstler, Wolfgang
A1  - Xia, Zhongfu
A1  - Weinhold, Till
A1  - Pucher, Andreas
A1  - Gerhard, Reimund
T1  - Piezoelectricity of porous polytetrafluoroethylene single- and multiple-film electrets containing high charge densities of both polarities
Y1  - 2000
ER  -