Influence of Ba-substitution on the structural and ferroelectric properties of Pb1-xBaxZr0.40Ti0.60O3 ceramic materials

Author(s)

Mesquita, A. ^[1] ; Michalowicz, A. ^{[2, 3]} ; Mastelaro, V. R. ^[4]

Affiliation

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

^[2] CNRS, Inst Chim & Mat Paris Est, F-94320 Thiais - France

^[3] Univ Paris 12, F-94320 Thiais - France

^[4] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: PHASE TRANSITIONS; v. 85, n. 8, p. 659-674, 2012.
• Web of Science Citations: 5

Abstract

This work presents a comprehensive study about the influence of Ba-substitution on the structural and ferroelectric properties of Pb1-xBaxZr0.40Ti0.60O3 (PBZT) ceramic system. Pb1-xBaxZr0.40Ti0.60O3 ceramic samples were then prepared by solid state reaction method and characterized as a function of composition and temperature by X-ray diffraction (XRD) and impedance spectroscopy techniques. The dielectric measurements show that the substitution of Pb2+ for Ba2+ ions leads to a diffuse behavior of the dielectric permittivity curves for all samples and that only the x = 0.50 sample presents a typical relaxor behavior. In good agreement with dielectric measurements, the structural phase transition study showed a phase transition from a tetragonal structure with P4mm space group to a cubic structure with Pm-3m space group for all samples, except for the x = 0.50 sample were a cubic structure was observed in the complete temperature interval measured. (AU)

• FAPESP's process: 07/00011-1 - Synthesis and structural characterization of relaxor ferroelectric compounds Pb1-xRxZr0,40Ti0,60O3 (R = La, BA)
• Grantee: Alexandre Mesquita
• Support Opportunities: Scholarships in Brazil - Doctorate