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Metal Salt‐Induced Ferroelectric Crystalline Phase in Poly(vinylidene fluoride) Films
Author(s) -
Yoon Sun,
Prabu Arun Anand,
Kim Kap Jin,
Park Cheolmin
Publication year - 2008
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800108
Subject(s) - ferroelectricity , fluoride , materials science , polarization (electrochemistry) , salt (chemistry) , phase (matter) , metal , chloride , mass fraction , analytical chemistry (journal) , chemical engineering , composite material , inorganic chemistry , dielectric , chemistry , optoelectronics , organic chemistry , metallurgy , engineering
In this Communication, the effect of varying mass fractions (0–20 wt.‐%) of calcium chloride (CaCl 2 ) salt on the α ‐ and β ‐phase content of poly(vinylidene fluoride) (PVDF) as‐cast films were investigated. Spectral and X‐ray studies revealed the maximum ferroelectric β ‐phase for the addition of 15 wt.‐% of CaCl 2 in PVDF compared to neat PVDF samples. The dense β ‐phase dominant PVDF–CaCl 2 (15 wt.‐%) thick film used as a ferroelectric insulator in one‐capacitor (1C) type random access memory device exhibited a remnant polarization of 3.1 µC · cm 2 , and is a good indication that the unoriented PVDF–CaCl 2 films can be used in electronic applications without further stretching process.