TY  - JOUR
A1  - Wegener, Michael
A1  - Wirges, Werner
A1  - Gerhard, Reimund
A1  - Dansachmüller, M.
A1  - Schwödiauer, R.
A1  - Bauer-Gogonea, Simona
A1  - Bauer, Siegfried
A1  - Paajanen, Mika
A1  - Minkkinen, Hannu
A1  - Raukola, J.
T1  - Controlled inflation of voids in cellular polymer ferroelectrets : optimizing electromechanical transducer properties
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. (C) 2004 American Institute of Physics
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Bauer, Siegfried
A1  - Bauer-Gogonea, Simona
A1  - Yilmaz, Sükrü
A1  - Dinger, Claudia
A1  - Wirges, Werner
A1  - Gerhard, Reimund
A1  - Michelotti, F.
A1  - Toussaere, E.
A1  - Levenson, R.
A1  - Liang, J.
A1  - Zyss, Joseph
T1  - Pyroelectric, dielectric and electro-optical investigation of crosslinking in Red Acid Magly
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Bauer, Siegfried
A1  - Bauer-Gogonea, Simona
A1  - Yilmaz, Sükrü
A1  - Wirges, Werner
A1  - Gerhard, Reimund
T1  - Pyroelectrical investigation of nonlinear optical polymers with uniform or patterned dipole orientation
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Bauer-Gogonea, Simona
A1  - Bauer, Siegfried
A1  - Wirges, Werner
A1  - Gerhard, Reimund
A1  - Wintler, H. J.
T1  - Physical aging after photo-induced or thermally assisted poling for enhancing the stability of polymeric dipole glasses
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Donval, Ariela
A1  - Berkovic, Garry
A1  - Bauer-Gogonea, Simona
A1  - Wirges, Werner
A1  - Bauer, Siegfried
A1  - Gerhard, Reimund
T1  - Pyroelectric depth profiling of the optical nonlinearity caused by charge injection
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Gerhard, Reimund
A1  - Bauer, Siegfried
A1  - Bauer-Gogonea, Simona
A1  - Brinker, Walter
A1  - Dinger, Claudia
A1  - Molzow, Wolf-Dietrich
A1  - Wirges, Werner
A1  - Yilmaz, Sükrü
T1  - Electro-optical investigation of the dipole orientation in poled polymers
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Bauer-Gogonea, Simona
A1  - Bauer, Siegfried
A1  - Wirges, Werner
A1  - Gerhard, Reimund
T1  - Preparation and pyroelectrical investigation of bimorph polymer layers
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Donval, Ariela
A1  - Berkovic, Garry
A1  - Yilmaz, Sükrü
A1  - Bauer-Gogonea, Simona
A1  - Brinker, Walter
A1  - Wirges, Werner
A1  - Bauer, Siegfried
A1  - Gerhard, Reimund
T1  - Spatial and thermal analysis of nonlinearity created by asymmetric charge injection
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Bauer-Gogonea, Simona
A1  - Wirges, Werner
A1  - Bauer, Siegfried
A1  - Gerhard, Reimund
A1  - Liang, J.
A1  - Zyss, Joseph
T1  - Electrical determination of the degree of cross-linking in a poled nonlinear optical polymer
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Bauer-Gogonea, Simona
A1  - Gerhard, Reimund
T1  - Nonlinear optical polymer electrets : current practice
Y1  - 1996
ER  -