Ferroelectric Properties of Poly (vinylidene fluoridetetrafluoroethylene).

摘要

Ferroelectric hysteresis of a copolymer of vinylidene fluoride with tetrafluoroethylene and of uniaxially-stretched polyvinylidene fluoride has been observed at 60Hz at room temperature. The measured remanent polarization of the copolymer was in good agreement with a calculated value using a frozen diploe model and measured piezoelectric coefficients. The dielectric constant for the copolymer has been measured at 1000Hz as a function of temperature and a large peak which may be interpreted as occurring at the curie temperature appears at 122 C.