Title :
Dielectric relaxation and resonance spectra of ferroelectric polyamide 11
Author :
Frübing, P. ; Kremmer, A. ; Ganster, J. ; Pissis, P. ; Gerhard-Multhaupt, R.
Author_Institution :
Dept. of Phys., Univ. of Potsdam, Germany
Abstract :
Ferroelectric polyamide 11 films were prepared by melt-quenching, cold-drawing and electrical poling. Ferroelectricity was checked by dielectric-hysteresis measurements. Dielectric spectroscopy was applied for determining piezoelectric constants from thickness-extension resonances as well as for investigating conformational changes due to quenching, stretching and electrical poling. A remanent polarisation of up to 35 mC/m2, a coercive field of 75 MV/m and a piezoelectric d33 coefficient of 2.7 pC/N were obtained. In the ferroelectric film, the dielectric α relaxation is suppressed whereas the β relaxation is enhanced.
Keywords :
dielectric hysteresis; dielectric relaxation; dielectric resonance; drawing (mechanical); ferroelectric materials; piezoelectric materials; polymer films; quenching (thermal); coercive field; cold-drawing; conformational characteristics; dielectric hysteresis; dielectric relaxation spectroscopy; electrical poling; ferroelectric polyamide 11 film; melt-quenching; piezoelectric coefficient; remanent polarisation; stretching; thickness-extension resonance; Amorphous materials; Dielectric measurements; Ferroelectric films; Ferroelectric materials; Hysteresis; Physics; Piezoelectric films; Polymer films; Resonance; Temperature;
Conference_Titel :
Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on
Print_ISBN :
0-7803-7560-2
DOI :
10.1109/ISE.2002.1042950
