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dc.contributor.authorLanfredi, Silvania-
dc.contributor.authorGenova, Diego H. M.-
dc.contributor.authorBrito, Iara A. O.-
dc.contributor.authorLima, Alan R. F.-
dc.contributor.authorNobre, Marcos Augusto Lima-
dc.identifier.citationJournal of Solid State Chemistry. San Diego: Academic Press Inc. Elsevier B.V., v. 184, n. 5, p. 990-1000, 2011.-
dc.description.abstractThe Curie temperature and its correlation with the magnitude of the displacement of the niobium atom from the center of [NbO6] octahedra in NaSr2Nb5O15 nanostructured powder were investigated. A single powder was prepared by high-energy ball milling. A powder with an average crystallite size of 37 nm was prepared by calcining the precursor at 1423 K. The refinement of the structural parameters was carried out by the Rietveld method. NaSr2Nb5O15 exhibits tetragonal symmetry with the tungsten bronze structure (a=b=12.3495 (6)angstrom, c=3.8911 (2)angstrom, V-593.432 (5) angstrom(3), and Z=2). The site occupancy of the Na and Sr2+ cations and the interatomic distances between the niobium and oxygen atoms were derived. The [NbO6] octahedron undergoes both rotation and tilting depending on the crystallographic site. The Curie temperature of the powder was derived using both the impedance and infrared spectroscopy methods. (C) 2011 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipFundação para o Desenvolvimento da UNESP (FUNDUNESP)-
dc.publisherAcademic Press Inc. Elsevier B.V.-
dc.sourceWeb of Science-
dc.subjectNanostructured powderen
dc.subjectRietveld methoden
dc.subjectInfrared spectroscopyen
dc.subjectImpedance spectroscopyen
dc.subjectCurie temperatureen
dc.titleStructural characterization and Curie temperature determination of a sodium strontium niobate ferroelectric nanostructured powderen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Estadual de Ponta Grossa (UEPG)-
dc.description.affiliationUniv Estadual Paulista, FCT, Presidente Prudente, SP, Brazil-
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto, SP, Brazil-
dc.description.affiliationUniversidade Estadual de Ponta Grossa (UEPG), Dept Quim, Ponta Grossa, PR USA-
dc.description.affiliationUnespUniv Estadual Paulista, FCT, Presidente Prudente, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Sao Jose do Rio Preto, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Solid State Chemistry-
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