Pinto, Alexandre H.Souza, Flavio L.Longo, Elson [UNESP]Leite, Edson R.Camargo, Emerson R.2014-05-202014-05-202011-10-17Materials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 130, n. 1-2, p. 259-263, 2011.0254-0584http://hdl.handle.net/11449/25288Quasi-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.259-263engOxidesCeramicsChemical synthesisDielectric propertiesArtigo10.1016/j.matchemphys.2011.06.040WOS:000295601700042Acesso restrito