Title :
Ferro- and piezoelectric properties of flexible ferroelectric and electret films
Author_Institution :
Dept. of Mater. Sci. & Eng., Univ. of Electron. Sci. & Technol. of China, Sichuan, China
Abstract :
A new development in the field of flexible ferroelectric and electret films based on PVDF (polyvinylidene fluoride) copolymer and blend-polymer is described, along with its composite film technology. The significance and properties of PVDF, PVDF-PMMA (polymethyl methacrylate), PVDF-PVC (polyvinyl chloride), PVDF/BT, and PVDF-PZT are investigated. Their microstructure analysis and applications are discussed. There exist three possible polarization mechanisms for ferroelectricity and electret in flexible films: β-crystal type, C-F bond polymer molecular chain with orientation and ordered domain, and spontaneous polarization ferroelectric domain. Ferroelectric composite effects are also present
Keywords :
dielectric polarisation; electrets; ferroelectric materials; piezoelectric materials; polymer blends; polymer films; C-F bond polymer molecular chain; PVDF; PVDF-PMMA; PVDF-PVC; PVDF-PZT; PVDF/BT; beta -crystal type; blend-polymer; composite film technology; copolymer; electret; electret films; flexible ferroelectric; microstructure analysis; ordered domain; orientation; piezoelectric properties; polarization mechanisms; polymethyl methacrylate; polyvinyl chloride; polyvinylidene fluoride; spontaneous polarization ferroelectric domain; Electrets; Ferroelectric films; Ferroelectric materials; Iron; Materials science and technology; Piezoelectric films; Polarization; Polymer films; Temperature; Testing;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167266
