A combined system of piezo-PWP/PEA methods for measuring space charge distribution in solid dielectrics

Author

Li, Jixiao ; Zhang, Yewen ; Qin, Xiaoqui ; Xia, Zhongfu ; Takada, Tatsuo

Author_Institution

Pohl Inst. of Solid State Phys., Tongji Univ., Shanghai, China

fYear

1999

fDate

1999

Firstpage

281

Lastpage

284

Abstract

A new system for measuring space charge distribution in solid dielectrics is presented. This system can be used for the piezoelectric pressure wave propagation method (piezo-PWP) and for the pulsed electroacoustic method (PEA). Both the principle of this system and the matching of acoustic impedance are mentioned. The piezo-PWP method and the PEA method can be combined into a same main structure. In the system, a thin β-PVDF film is used as an acoustic pulse generator in PWP method and as a piezoelectric measuring device in PEA method. For this combined system, the experimental results show that the resolution of the piezo-PWP is in same order than the PEA method. But the sensitivity of the PEA is higher than the piezo-PWP method

Keywords

acoustic impedance; acoustic wave propagation; dielectric thin films; piezoelectric thin films; polymer films; space charge; acoustic pulse generator; piezo-PWP/PEA methods; piezoelectric pressure wave propagation method; pulsed electroacoustic method; solid dielectrics; space charge distribution; thin β-PVDF film; Acoustic devices; Acoustic measurements; Acoustic propagation; Charge measurement; Current measurement; Dielectric measurements; Extraterrestrial measurements; Pulsed electroacoustic methods; Solids; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-5025-1

Type

conf

DOI

10.1109/ISE.1999.832042

Filename

832042