Title :
The use of pulsed electric acoustic technique for measuring electric field profiles in ferroelectric ceramic
Author :
Giacometti, J.A. ; Eiras, J.A. ; Lente, M. ; Tomioka, J. ; Wisniewski, C. ; Moura, W.A.
Author_Institution :
Faculdade de Ciencias e Tecnologia, Univ. Estadual Paulista, Brazil
Abstract :
The pulsed electric acoustic technique, PEA, have been usually applied to probe space charge profiles in polymers. In this work we show preliminary results obtained with lead zirconate-titanate and niobium, PZTN, ferroelectric ceramic samples. Experiments showed that induced charge densities on sample electrodes are mainly due to the ferroelectric polarization of the sample. We present results of the typical PEA response and the procedure to deconvolute the signal in order to obtain the charge densities and the electric field profiles. The PEA setup allows us to show a non-uniform polarization during ferroelectric switching.
Keywords :
deconvolution; dielectric measurement; dielectric polarisation; ferroelectric ceramics; ferroelectric switching; lead compounds; pulsed electroacoustic methods; space charge; PZT:Nb; PZTN; PbZrO3TiO3:Nb; electric field; ferroelectric ceramic; ferroelectric polarization; ferroelectric switching; pulsed electric acoustic measurement; signal deconvolution; space charge; Acoustic measurements; Acoustic pulses; Ceramics; Electric variables measurement; Ferroelectric materials; Polarization; Polymers; Probes; Pulse measurements; Space charge;
Conference_Titel :
Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on
Print_ISBN :
0-7803-7560-2
DOI :
10.1109/ISE.2002.1043019
