dc.contributor | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor | Universidade Federal do ABC (UFABC) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T15:31:43Z | |
dc.date.accessioned | 2022-10-05T17:06:08Z | |
dc.date.available | 2014-05-20T15:31:43Z | |
dc.date.available | 2022-10-05T17:06:08Z | |
dc.date.created | 2014-05-20T15:31:43Z | |
dc.date.issued | 2010-12-01 | |
dc.identifier | Materials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 124, n. 2-3, p. 1051-1056, 2010. | |
dc.identifier | 0254-0584 | |
dc.identifier | http://hdl.handle.net/11449/40776 | |
dc.identifier | 10.1016/j.matchemphys.2010.08.030 | |
dc.identifier | WOS:000284434100030 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3911729 | |
dc.description.abstract | Nanosized powders of lead lanthanum titanate (Pb(1-x)La(x)TiO(3)) were synthesized by means of the oxidant-peroxo method (OPM) Lanthanum was added from 5 to 30% in mol through the dissolution of lanthanum oxide in nitric acid followed by the addition of lead nitrate to prepare a solution of lead and lanthanum nitrates which was dripped into an aqueous solution of titanium peroxo complexes forming a reactive amorphous precipitate that could be crystallized by heat treatment Crystallized powders were characterized by FT-Raman spectroscopy and X-ray powder diffraction showing that tetragonal perovskite structure is obtained for samples up to 25% of lanthanum and cubic perovskite for samples with 30% of lanthanum Powders containing 25 and 30% in mol of lanthanum were calcined at 700 degrees C for 2 h and in order to determine the relative dielectric permittivity and the phase transition behaviour from ferroelectric-to-paraelectric ceramic pellets were prepared and sintered at 1100 or 1150 degrees C for 2 h and subjected to electrical characterization It was possible to observe that sample containing 25% in mol of La presented a normal behaviour for the phase transition whereas the sample containing 30% in mol of La presented a diffuse phase transition and relaxor behaviour (C) 2010 Elsevier B V All rights reserved | |
dc.language | eng | |
dc.publisher | Elsevier B.V. Sa | |
dc.relation | Materials Chemistry and Physics | |
dc.relation | 2.210 | |
dc.relation | 0,615 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | Oxides | |
dc.subject | Chemical synthesis | |
dc.subject | Crystal structures | |
dc.subject | Dielectric properties | |
dc.title | Characterization of dense lead lanthanum titanate ceramics prepared from powders synthesized by the oxidant peroxo method | |
dc.type | Artigo | |