Wet-chemical synthesis of magnesium niobate nanoparticles powders

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dc.contributor.authorSantos, L. P. S.
dc.contributor.authorCamargo, E. R.
dc.contributor.authorFabbro, M. T.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorLeite, E. R.
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:26:09Z
dc.date.available2014-05-20T15:26:09Z
dc.date.issued2007-01-01
dc.description.abstractNanosized and highly reactive magnesium mobate (MgNb2O6) powders were successfully synthesized by a new wet-chemical method by means of the dissolution of Nb2O5 center dot 5H(2)O and in a solution of oxalic acid followed by the addition of stoichiometric amounts of magnesium carbonate. The Nb-Mg-oxalic acid solution was evaporated resulting in a dry and amorphous powder that was calcined in the temperature range from 200 to 900 degrees C for 2 h. The crystallization process from the amorphous state to the crystalline MgNb2O6 was followed by thermal analysis. The calcined powders characterized by FT-Raman spectroscopy, X-ray diffraction (XRD) and their morphology examined by high resolution scanning electron microscopy (HR-SEM). Pure MgNb2O6, free from the second phases and obtained at 800 degrees C was confirmed by a combined analysis using XRD and FT-Raman. The average diameter of the particles was calculated from the HR-SEM image as 70 urn approximately. This technique allows a better mixing of the constituent elements and thus a better reactivity of the mixture to obtain pre-reaction products with high purity at lower temperatures and reducing cost. It can offer a great advantage in the PMN-PT formation with respect to the solid-state synthesis. (c) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en
dc.description.affiliationUniv Fed Sao Carlos, Dept Quim, Lab Interdisciplinar Electroquim & Ceram, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Fac Ciências, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciências, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.format.extent1205-1209
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2006.04.006
dc.identifier.citationCeramics International. Oxford: Elsevier B.V., v. 33, n. 7, p. 1205-1209, 2007.
dc.identifier.doi10.1016/j.ceramint.2006.04.006
dc.identifier.issn0272-8842
dc.identifier.urihttp://hdl.handle.net/11449/36359
dc.identifier.wosWOS:000249191700010
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofCeramics International
dc.relation.ispartofjcr3.057
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectMgNb2O6pt
dc.subjectcolumbitept
dc.subjectmagnesium niobatept
dc.subjectlow temperature synthesispt
dc.subjectFT-Ramanpt
dc.titleWet-chemical synthesis of magnesium niobate nanoparticles powdersen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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