Improving Ferro- and Piezo- Electric Properties of Hydrogenized Poly（vinylidene fluoride-trifluoroethylene） Films by Annealing at Elevated Temperatures

After annealing the solution cast P（VDF-TrFE） films at elevated temperatures, which were synthesized via a full hydrogenation process from P（VDF-CTFE） with a composition of VDF/TrFE = 80/20（mol%）, a series of P（VDF-TrFE） films were fabricated in present work. The crystalline and ferroelectric phases...

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Bibliographic Details
Published in:高分子科学：英文版 2016 (5), p.649-658
Main Author: Jian Wang Zhong Li Yuan Yan Xiao Wang Yun-chuan Xie Zhi-cheng Zhang
Format: Article
Language:English
Subjects:
P（VDF-TrFE）
三氟乙烯
偏氟乙烯
压电性能
聚铁
薄膜
退火温度
高介电常数
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Summary:After annealing the solution cast P（VDF-TrFE） films at elevated temperatures, which were synthesized via a full hydrogenation process from P（VDF-CTFE） with a composition of VDF/TrFE = 80/20（mol%）, a series of P（VDF-TrFE） films were fabricated in present work. The crystalline and ferroelectric phases of the films were carefully characterized and their dielectric, ferroelectric and piezoelectric properties were systematically investigated. The improved crystalline and ferroelectric phases in the films induced by annealing at elevated temperatures are responsible for the significant improved electric properties of the films. The optimized annealing temperature is found to be 130 ℃ and the best performance including the highest dielectric constant of 12.5 at 1 kHz, the largest maximum polarization of 11.21 μC/cm^2 and remnant polarization of 7.22 μC/cm^2, the lowest coercive electric field of 56 MV/m, and the highest piezoelectric coefficient of -25 pC/N is observed.
ISSN:0256-7679
1439-6203