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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/34891
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dc.contributor.authorBruno, J. C.-
dc.contributor.authorCavalheiro, A. A.-
dc.contributor.authorZaghete, M. A.-
dc.contributor.authorCilense, M.-
dc.contributor.authorVarela, José Arana-
dc.date.accessioned2014-05-20T15:24:15Z-
dc.date.accessioned2016-10-25T17:58:25Z-
dc.date.available2014-05-20T15:24:15Z-
dc.date.available2016-10-25T17:58:25Z-
dc.date.issued2004-03-15-
dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2003.11.014-
dc.identifier.citationMaterials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 84, n. 1, p. 120-125, 2004.-
dc.identifier.issn0254-0584-
dc.identifier.urihttp://hdl.handle.net/11449/34891-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/34891-
dc.description.abstractSingle-phase perovskite 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) (PMN-PT) powders were prepared by using a Ti-modified columbite precursor (MNT) obtained by the polymeric precursor method. The innovation consists in the preparation of Ti-modified columbite in order to react directly with a stoichiometric amount of PbO to obtain pyrochlore-free PMN-PT powders. It has been shown that titanium oxide forms a solid solution with columbite (MN) and does not affect the obtaining of a single-phase columbite precursor. Thus, a high amount of perovskite phase can be obtained by reaction with PbO at 800 degreesC for 2 h. Effects of K and Li additives on the structure of MNT and PMN-PT were studied. X-ray diffraction studies were carried out to verify the phase formation at each processing step and these data were used for structural refinement by the Rietveld method. Both K and Li additives increase the crystallinity of MNT powders, being this effect more intense for the Li-doped samples. For PMN-PT samples the additives cause an insignificant decrease in the amount of perovskite phase. The morphology of the PMN-PT powder depends on the type of the additive. (C) 2003 Elsevier B.V All rights reserved.en
dc.format.extent120-125-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjectceramicspt
dc.subjectchemical synthesispt
dc.subjectpowder diffractionpt
dc.subjectRietveldpt
dc.subjectPb(Mg1/3Nb2/3)O-3pt
dc.titleStructural effects of Li and K additives on the columbite precursor and 0.9PMN-0.1PT powdersen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUNESP, Inst Quim, CMDMC, BR-14801970 Araraquara, SP, Brazil-
dc.description.affiliationUnespUNESP, Inst Quim, CMDMC, BR-14801970 Araraquara, SP, Brazil-
dc.identifier.doi10.1016/j.matchemphys.2003.11.014-
dc.identifier.wosWOS:000188857400019-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofMaterials Chemistry and Physics-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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