Advanced search
Start date
(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

Full text
Pinto, Alexandre H. [1] ; Souza, Flavio L. [2] ; Longo, Elson [3] ; Leite, Edson R. [1] ; Camargo, Emerson R. [1]
Total Authors: 5
[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

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)