Moura, W. A.Eiras, J. A.Lente, M.Tomioka, J.Wisniewski, C.Giacometti, José Alberto [UNESP]2014-05-272014-05-272002-01-01Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report, p. 899-902.0084-9162http://hdl.handle.net/11449/66769The pulsed electric acoustic technique, PEA, has been usually applied to probe space charge profiles in polymers. Preliminary PEA results using a ferroelectric ceramic are presented. If the reverse applied electric field i of the order of the coercive field the switching polarization process occurs in a period larger than hundreds of seconds. Such a slow process allows one to use the PEA setup to follow the polarization switching dynamics and determine the electric field profile. The PEA signal obtained in the lead zirconate-titanate doped with niobium ceramic, PZTN, indicates that the polarization distribution and field are not uniform during the switching period. We were also able to observe that the acoustic wave velocity and attenuation depends on the stage of the polarization switching, which agrees with results obtained using the ultrasonic method.899-902engAttenuationCoercive forceElectric fieldsPolarizationPolymersUltrasonicsPulsed electric acoustic techniquesFerroelectric ceramicsTrabalho apresentado em evento10.1109/CEIDP.2002.1048940WOS:000179333500215Acesso aberto2-s2.0-0036438490