Title :
Thermal hysteresis in the permittivity and polarization of lead zirconate titanate/vinylidenefluoride-trifluoroethylene 0-3 composites
Author :
Chan, H.L.W. ; Chen, Y. ; Choy, C.L.
Author_Institution :
Dept. of Appl. Phys., Hong Kong Polytech., Hung Hom, Hong Kong
fDate :
12/1/1996 12:00:00 AM
Abstract :
The permittivities of 70/30 vinylidene fluoride-trifluoroethylene copolymer and lead zirconate titanate/vinylidene fluoride-trifluoroethylene 0-3 composites have been measured at 1 kHz over the temperature range of 20 to 120°C. Thermal hysteresis was observed for the 0-3 composites and abrupt changes in the permittivities occurred at different temperatures upon heating and cooling. Good agreement was found between the measured permittivities and the predictions of the Bruggeman model. Implications of the thermal hysteresis behavior on the poling of 0-3 composites are also discussed
Keywords :
composite materials; dielectric hysteresis; dielectric polarisation; lead compounds; permittivity; piezoceramics; polymer blends; 1 kHz; 20 to 120 C; Bruggeman model; PZT; PbZrO3TiO3; lead zirconate titanate/vinylidenefluoride-trifluoroethylene 0-3 composite; permittivity; polarization; thermal hysteresis; vinylidene fluoride-trifluoroethylene copolymer; Ceramics; Conductivity; Dielectric losses; Hysteresis; Permittivity measurement; Physics; Piezoelectric polarization; Polymers; Temperature; Titanium compounds;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
