Influence of diffuse phase transition on the anelastic behavior of Nb-doped Pb(Zr0.53Ti0.47)O-3 ceramics

Author(s)

da Silva, Jr., Paulo Sergio ^[1] ; Venet, Michel ^[1] ; Florencio, Odila ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Phys, BR-13560 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of Alloys and Compounds; v. 647, p. 784-789, OCT 25 2015.
• Web of Science Citations: 11

Abstract

In this study, we investigated the possible physical mechanisms giving rising to thermally activated anelastic relaxations in Nb-doped Pb(Zr0.53Ti0.47)O-3 ceramics, at temperatures below the ferro-paraelectric phase transition. The dielectric analysis showed a ferro-paraelectric diffuse phase transition, extended over a wide temperature range, but without relaxor behavior. From the anelastic measurements, three regions with anomalies were identified. The mechanisms involved with anomalies between 300-570 K had been previously investigated for Pb(ZrxTi1-x)O-3-based materials. However, the responsible mechanisms by the other anelastic relaxation peak, at 596 K, are controversial. The results and analysis described here show that this peak can be related to the freezing of the polar regions or to the strong pinning of ferroelectric clusters and domains, which are responsible for the observed diffuse phase transition in this ferroelectric material. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/00134-7 - Obtaining and improvement of properties of lead free magnetoelectric composites
• Grantee: Michel Venet Zambrano
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/08457-7 - Study of the phase transitions of the lead-free piezoceramics by mechanical spectroscopy
• Grantee: Paulo Sergio da Silva Junior
• Support Opportunities: Regular Research Grants