TY - GEN
T1 - Ferroelectric relaxor terpolymers
T2 - 2005 12th International Symposium on Electrets, ISE 12
AU - Bauer, F.
AU - Fousson, E.
AU - Zhang, Q. M.
PY - 2005
Y1 - 2005
N2 - Ferroelectric materials are intrinsically multifunctional and have found a broad range of applications. A new class of semicrystalline terpolymers comprising vinylidene fluoride (VDF), trifluoroethylene (TrFE), and 1,1-chlorofluoroethylene (CFE), were prepared at ISL via a suspension polymerization process. A cooperative research program between our laboratories has led to extensive characterization and understanding of many compositions of these new relaxor terpolymers. Relevant studies and results show that this class of electroactive polymers offers unique properties in comparison with other ferroelectric polymers. The terpolymer exhibits high electrostrictive strain (>7%) with relatively high modulus (>0.3GPa). It has been also observed that the large electrostrictive strain is nearly constant in the temperature range from 20°C to 80°C. The high room temperature relative dielectric constant (∼ 50, which is the highest among all the known polymers), high induced polarization (∼ 0.05 C/m2), and high electric breakdown field (>400 MV/m) lead to very high volume efficiency for the electric energy storage operated under high voltage (∼ 10 J/cm3). It should be pointed out that large entropy change associated with the polarization change in the material has been observed.
AB - Ferroelectric materials are intrinsically multifunctional and have found a broad range of applications. A new class of semicrystalline terpolymers comprising vinylidene fluoride (VDF), trifluoroethylene (TrFE), and 1,1-chlorofluoroethylene (CFE), were prepared at ISL via a suspension polymerization process. A cooperative research program between our laboratories has led to extensive characterization and understanding of many compositions of these new relaxor terpolymers. Relevant studies and results show that this class of electroactive polymers offers unique properties in comparison with other ferroelectric polymers. The terpolymer exhibits high electrostrictive strain (>7%) with relatively high modulus (>0.3GPa). It has been also observed that the large electrostrictive strain is nearly constant in the temperature range from 20°C to 80°C. The high room temperature relative dielectric constant (∼ 50, which is the highest among all the known polymers), high induced polarization (∼ 0.05 C/m2), and high electric breakdown field (>400 MV/m) lead to very high volume efficiency for the electric energy storage operated under high voltage (∼ 10 J/cm3). It should be pointed out that large entropy change associated with the polarization change in the material has been observed.
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M3 - Conference contribution
AN - SCOPUS:33847757814
SN - 0780391160
SN - 9780780391161
T3 - Proceedings - International Symposium on Electrets
SP - 117
EP - 120
BT - 2005 12th International Symposium on Electrets, ISE 12 - Proceedings
Y2 - 11 September 2005 through 14 September 2005
ER -