西安理工大学学报2012，Vol.28Issue(2)：173-177,5.
热处理方式对P(VDF-co-TrFE)压电、介电及铁电性能的影响
Influence of Thermal Processing on Piezoelectric,Dielectric and Ferroelectric Properties of a Poly(vinylidenefluoride-co-trifluoroethylene)Copolymers
摘要
Abstract
Poly (vinylidenefluoride-co-trifluoroethylene) (P( VDF-co-TrFE) ) ferroelectric thick films are prepared in solution casting method. X-Ray Diffraction ( XRD) and Differential Scanning Calorimeter (DSC) are employed to character the crystal structures of the ferroelectric copolymer. On the basis of which Polarized Optical Microscopy ( POM ) is used to treat the copolymer so as to make the piezoelectric constant (d33) raise to -22 pC/N and to compare the crystal properties of the copolymer with different thermal treatments of three kinds. Then P( VDF-co-TrFE) electrets are obtained by hot-poling process and the dielectric properties of annealed P( VDF-co-TrFE) with different d33 are compared through the dielectric lest system. The results illustrate that dielectric constants (εr) decrease as the function of d33 increase. Finally, ferroelectric test system is employed to express how dipoles reverse influence on polarization properties. The results illustrate that the improvement of crystal properties as well as remnant polarization are an effective way to obtain copolymer films with high piezoelectric property.关键词
P(VDF-co-TrFE)/晶态结构/压电/介电/铁电Key words
P( VDF-co-TrFE)/ crystal structure/ piezoelectric/ dielectric/ ferroelectric分类
通用工业技术引用本文复制引用
夏卫民,曹从军,邢俊红,陈源清,刘芸..热处理方式对P(VDF-co-TrFE)压电、介电及铁电性能的影响[J].西安理工大学学报,2012,28(2):173-177,5.基金项目
国家自然科学基金资助项目(51103115) （51103115）
陕西省教育厅科学研究计划基金资助项目(2012JK441,2010JK696,2010JK726). （2012JK441,2010JK696,2010JK726）
