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

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: PHASE TRANSITIONS; v. 85, n. 8, p. 659-674, 2012.
• Citações Web of Science: 5
• Assunto(s): Materiais ferroelétricos

Resumo

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)

• Processo FAPESP: 07/00011-1 - Síntese e caracterização estrutural de compostos ferroelétricos relaxores Pb1-xRxZr0,40Ti0,60O3 (R = La, BA)
• Beneficiário: Alexandre Mesquita
• Modalidade de apoio: Bolsas no Brasil - Doutorado