Title :
Study of the local electric field and the Curie transition of ferroelectric polymers
Author :
Ogura, Hiroshi ; Chiba, Akio ; Kase, Kunio
Author_Institution :
Dept. of Electron. & Inf. Technol., Sony Inst. of Higher Educ., Kanagawa, Japan
Abstract :
The ferroelectric properties of polyvinylidene fluoride (PVDF) and vinylidene fluoride/trifluoroethylene (VDF/TrFE) copolymers were investigated, with special emphasis on their local electric field and phase transition behavior. The objective of this work was (1) to find the theoretical values of the spontaneous polarization of PVDF and VDF/TrFE copolymers; (2) to evaluate experimentally the Lorentz factor for PVDF β-phase crystal, which relates the local electric field to the spontaneous polarization; and (3) to investigate the influence of the electrostatic interactions on ferroelectric-to-paraelectric phase transition of VDF/TrFE copolymers
Keywords :
dielectric polarisation; ferroelectric Curie temperature; ferroelectric materials; polymer blends; polymers; Curie transition; Lorentz factor; PVDF; TrFE; VDF/TrFE; beta -phase crystal; copolymers; electrostatic interactions; ferroelectric polymers; ferroelectric properties; ferroelectric-to-paraelectric phase transition; local electric field; phase transition behavior; polyvinylidene fluoride; spontaneous polarization; trifluoroethylene; vinylidene fluoride/trifluoroethylene; Dielectrics; Educational institutions; Electrostatics; Ferroelectric materials; Information technology; Lattices; Physics education; Piezoelectric polarization; Polymers; Pyroelectricity;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172267
