Effect of some dopants on temperature of high-temperature phase transitions of Na0.5Bi0.5TiO3-0.06BaTiO3 lead-free relaxor ferroelectrics ceramics seen via acoustic emission

Evgeniy Dul'Kin, Jenia Tiagunova, Evgeny Mojaev, Michael Roth

Research output: Contribution to journalArticlepeer-review

Abstract

Na0.5Bi0.5TiO3-0.06BaTiO3 relaxor ferroelectrics ceramic samples doped with 1 wt% of CuO, Fe2O3, Sb2O3, La2O3 and Ta2O5 were investigated by means of dielectric and acoustic emission methods in the high-temperature range. Dielectric constants exhibited a wide and smeared maximum at the temperature T m, accompanied by acoustic emission sharp bursts, but the dielectric constants exhibited no anomaly when further transiting into cubic paraelectric phase at the temperature T p, accompanied by acoustic emission sharp bursts, too. Based on acoustic emission data the shifts of these two temperatures, T m and T p, in dependence on a wt% of the incorporated ions as well as the acoustic emission count rate distribution in dependence on the incorporated ions radii were plotted and discussed.

Original languageAmerican English
Article number67002
JournalLettere Al Nuovo Cimento
Volume129
Issue number6
DOIs
StatePublished - Mar 2020

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