Microwave-hydrothermal synthesis of barium strontium titanate nanoparticles

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dc.contributor.authorSimões, Alexandre Zirpoli [UNESP]
dc.contributor.authorMoura, F.
dc.contributor.authorOnofre, T. B.
dc.contributor.authorRamirez, M. A. [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Federal de Itajubá (UNIFEI)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:18:30Z
dc.date.available2014-05-20T14:18:30Z
dc.date.issued2010-10-22
dc.description.abstractHydrothermal-microwave method (HTMW) was used to synthesize crystalline barium strontium titanate (Ba(0.8)Sr(0.2)TiO(3)) nanoparticles (BST) in the temperature range of 100-130 degrees C. The crystallization of BST with tetragonal structure was reached at all the synthesis temperatures along with the formation of BaCO(3) as a minor impurity at lower syntheses temperatures. Typical FT-IR spectra for tetragonal (BST) nanoparticles presented well defined bands, indicating a substantial short-range order in the system. TG-DTA analyses confirmed the presence of lattice OH- groups, commonly found in materials obtained by HTMW process. FE/SEM revealed that lower syntheses temperatures led to a morphology that consisted of uniform grains while higher syntheses temperature consisted of big grains isolated and embedded in a matrix of small grains. TEM has shown BST nanoparticles with diameters between 40 and 80 nm. These results show that the HTMW synthesis route is rapid, cost effective, and could serve as an alternative to obtain BST nanoparticles. (C) 2010 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniversidade Federal de Itajubá (UNIFEI) Unifei, BR-3590037 Itabira, MG, Brazil
dc.description.affiliationUniv Estadual Paulista Unesp, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUNESP, Inst Quim, Dept Fisicoquim, LIEC, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Unesp, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, Dept Fisicoquim, LIEC, BR-14800900 Araraquara, SP, Brazil
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.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent620-624
dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2010.08.143
dc.identifier.citationJournal of Alloys and Compounds. Lausanne: Elsevier B.V. Sa, v. 508, n. 2, p. 620-624, 2010.
dc.identifier.doi10.1016/j.jallcom.2010.08.143
dc.identifier.issn0925-8388
dc.identifier.urihttp://hdl.handle.net/11449/25577
dc.identifier.wosWOS:000283954000076
dc.language.isoeng
dc.publisherElsevier B.V. Sa
dc.relation.ispartofJournal of Alloys and Compounds
dc.relation.ispartofjcr3.779
dc.relation.ispartofsjr1,020
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectNanoparticleen
dc.subjectChemical synthesisen
dc.subjectMicrowaveen
dc.subjectElectron microscopyen
dc.subjectCrystal structureen
dc.titleMicrowave-hydrothermal synthesis of barium strontium titanate nanoparticlesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V. Sa
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Físico Química - IQ