Ferroelectric‐to‐paraelectric phase transition of vinylidene fluoride‐trifluoroethylene copolymer
| Autor: | Ueda Toshinobu, Toyoki Kitayama, Yamada Takeshi |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Phase transition
Materials science Analytical chemistry Physics::Optics General Physics and Astronomy Infrared spectroscopy Crystal structure Dielectric Ferroelectricity Polyvinylidene fluoride Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science Crystallography chemistry.chemical_compound chemistry Condensed Matter::Superconductivity Copolymer Curie constant |
| Zdroj: | Journal of Applied Physics. 52:948-952 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.328783 |
| Popis: | The ferroelectric properties of vinylidene fluoride‐trifluoroethylene copolymer were studied. The infrared absorption spectra and x‐ray diffraction patterns of the melt‐crystallized film suggested the similar crystalline form to the polar form I of polyvinylidene fluoride. It was found that the ferroelectric‐to‐paraelectric phase transition occurred at 70 °C and was the first order in the melt‐crystallized copolymer film by studying the dielectric constant, piezoelectric constant, D‐E hysteresis loop, and DSC measurement. The Curie constant was 2200 K. The phase transition was accompanied by the expansion of the crystal lattice. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|