Title :
Preliminary study of multi-layer space-charge electrets with piezoelectric properties from porous and non-porous Teflon films
Author :
Gerhard-Multhaupt, R. ; Xia, Zhongfu ; Kunstler, W. ; Pucher, A.
Author_Institution :
Dept. of Phys., Potsdam Univ., Germany
Abstract :
Non-uniform electrets consisting of at least one “soft” porous and at least one “hard” nonporous Teflon PTFE film were investigated for their piezoelectric properties. Two, three, or four films were corona-charged and assembled in various multi-layer stacks. Quasi-static piezoelectric responses of the same order as in ferroelectric fluoropolymers could be obtained in the best cases. As expected, the observed piezoelectric coefficients scale linearly with the charge density and also strongly depend on the respective layer geometry
Keywords :
dielectric thin films; electrets; piezoelectric thin films; polymer films; porous materials; space charge; charge density; corona-charged; multi-layer space-charge electrets; multi-layer stacks; nonporous Teflon films; piezoelectric properties; porous Teflon films; quasi-static piezoelectric responses; respective layer geometry; Assembly; Electrets; Electrodes; Ferroelectric films; Physics; Piezoelectric films; Polymers; Pyroelectricity; Solids; Thermal stresses;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.832040
