Title :
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
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;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.832042
