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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Structural and dielectric characterization of praseodymium-modified lead titanate ceramics synthesized by the OPM route

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Author(s):
Pinto, Alexandre H. [1] ; Souza, Flavio L. [2] ; Longo, Elson [3] ; Leite, Edson R. [1] ; Camargo, Emerson R. [1]
Total Authors: 5
Affiliation:
[1] UFSCar Fed Univ Sao Carlos, Dept Chem, LIEC Lab Interdisciplinar Eletroquim & Cerem, BR-13565905 Sao Carlos, SP - Brazil
[2] UFABC Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil
[3] UNESP Sao Paulo State Univ, Chem Inst Araraquara, Dept Biochem, BR-14801907 Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Materials Chemistry and Physics; v. 130, n. 1-2, p. 259-263, OCT 17 2011.
Web of Science Citations: 4
Abstract

Quasi-spherical nanoparticles of praseodymium-modified lead titanate powder (Pb(0.80)Pr(0.20)TiO(3)) with an average size of 54.8 nm were synthesized successfully by the oxidant-peroxo method (OPM) and were used to prepare highly dense ceramic bodies which were sintered at 1100 and 1150 degrees C for 2 h. A tetragonal phase was identified in the powder and ceramic samples by X-ray powder diffraction and FT-Raman spectroscopy at room temperature. The fractured surface of the ceramic sample showed a high degree of densification with fairly uniform grain sizes. Dielectric constants measured in the range of 30-300 degrees C at different frequencies (120 Hz and at 1,10 and 100 kHz) indicated that samples with 20 mol% praseodymium showed normal ferroelectric behavior regardless of the sintering temperature. (C) 2011 Elsevier B.V. All rights reserved. (AU)