Performance of Piezoelectrets Made of Non-porous Polytetrafluoroethylene and Fluoroethylenepropylene Layers
The thermal stability of piezoelectric d33 coefficients and charge dynamics in the piezoelectret films with tailored microstructure, made of non-porous polytetrafluoroethylene (PTFE) and fluoroethylenepropylene (FEP) layers, are investigated by the measurements of the isothermal decay of piezoelectric d33 coefficients at elevated temperatures and the analysis of thermally stimulated discharge (TSD) current spectra in short circuit, respectively. The results show that the quasi-static piezoelectric d33 coefficient up to 300 pC/N is achieved and its Youngs modulus is about 0.28 MPa. The d33 values in the present studied films show improved thermal stability compared with the films without regular microstructure. The drift path for the most of detrapped charges in the films is through the solid dielectric layer.
piezoelectret tailored structure piezoelectricity thermal stability charge dynamics
Zhuanlan Sun Xiaoqing Zhang Gongxun Cao Kexing Lou Zhongfu Xia
Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology,Tongji Univers Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji Univer
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
343-347
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）