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

Autor(es)

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

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 647, p. 784-789, OCT 25 2015.
• Citações Web of Science: 11

Resumo

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)

• Processo FAPESP: 13/00134-7 - Obtenção e aprimoramento das propriedades de compósitos magnetoelétricos livres de chumbo
• Beneficiário: Michel Venet Zambrano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/08457-7 - Estudo das transições de fases de cerâmicas piezoelétricas livres de chumbo por espectroscopia mecânica
• Beneficiário: Paulo Sergio da Silva Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular