Size-induced diffuse behavior in Pb0.89La0.11Zr0.40Ti0.60O3 nanocrystalline ferroelectric ceramics

Author(s)

Mesquita, Alexandre ^{[1, 2]} ; Godart, Claude ^[2] ; Michalowicz, Alain ^[2] ; Mastelaro, Valmor R. ^[1]

Affiliation

^[1] Univ Sao Paulo, IFSC, BR-13560970 Sao Carlos, SP - Brazil

^[2] CNRS UPEC, ICMPE, F-94320 Thiais - France

• Document type: Journal article
• Source: SOLID STATE SCIENCES; v. 14, n. 9, p. 1392-1397, SEP 2012.
• Web of Science Citations: 2

Abstract

The Pb1-xLaxZryTi1-yO3 system is a perovskite ABO(3) structured material which presents ferroelectric properties and has been used as capacitors, actuators, transducers and electro-optic devices. In this paper, we describe the synthesis and the characterization of Pb0.89La0.11Zr0.40Ti0.60O3 (PLZT11) nanostructured material. The precursor polymeric method and the spark plasma sintering technique were respectively used to prepare ceramic samples. In order to compare the effect of grain size, microcrystalline PLZT11 ceramic samples were also prepared. PLZT11 samples were characterized by X-ray diffraction technique which results show a reduction on the degree of tetragonality as the average grain size decreases. Moreover, the grain size decrease to a nanometer range induces a diffuse behavior on the dielectric permittivity curves as a function of the temperature and a reduction on the dielectric permittivity magnitude. Furthermore, the large number of grain boundaries due to the nanometer size gives rise to a dielectric anomaly. (C) 2012 Elsevier Masson SAS. All rights reserved. (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