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. (27th April 2020)

• Record Type: Journal Article
• Authors: Dul'kin, Evgeniy; Tiagunova, Jenia; Mojaev, Evgeny; Roth, Michael
• Is Part Of: Europhysics letters. Volume 129:Number 6(2020)
• Publication Date: 2020-04-27
• Subjects: 77.80.Jk -- 77.80.B- -- 43.40.Le; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/129/67002
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: Na0.5 Bi0.5 TiO3 -0.06BaTiO3 relaxor ferroelectrics ceramic samples doped with 1 wt% of CuO, Fe2 O3, Sb2 O3, La2 O3 and Ta2 O5 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.