Surface modification of SnO 2 nanoparticles containing Mg or Fe: Effects on sintering

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dc.contributor.authorCastro R.H.R.
dc.contributor.authorPereira G.J.
dc.contributor.authorGouvea D.
dc.date.accessioned2019-08-20T00:17:42Z
dc.date.available2019-08-20T00:17:42Z
dc.date.issued2007
dc.description.abstractControlling the surface chemistry of oxide systems has emerged an effective tool to obtain desirable nanostructures and macro properties. A relatively simple way to achieve this is by using dopants that are prone to segregate to the surfaces of the powders. In this work, we delineate the effect of Mg and Fe on SnO 2 nanopowders focusing on the surface modifications caused by surface segregation. The effects of increasing the temperature of calcinations are particularly addressed to evaluate the surface modifications at high temperatures. The powders were studied by infrared spectroscopy, zeta potential measurements, X-ray diffraction, and specific surface area measurements. Since sintering is a high-temperature process strongly dependent on surface characteristics, we drawn a relationship between the final densities after sintering and the surface chemistry of the doped powders. Doped SnO 2 pellets were sintered to over 95% of the theoretical density within a few seconds (fast firing) when significant surface modifications were observed. © 2006 Elsevier B.V. All rights reserved.
dc.description.firstpage4581
dc.description.issuenumber10
dc.description.lastpage4585
dc.description.volume253
dc.identifier.citationCASTRO, R. H. R.; PEREIRA, G. J.;Pereira, Gilberto J.;PEREIRA, GILBERTO JOSÉ; GOUVEA, D.. Surface modification of SnO2 nanoparticles containing Mg or Fe: Effects on sintering. APPLIED SURFACE SCIENCE, v. 253, n. 10, p. 4581-4585, 2007.
dc.identifier.doi10.1016/j.apsusc.2006.10.010
dc.identifier.issn0169-4332
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/2365
dc.relation.ispartofApplied Surface Science
dc.rightsAcesso Restrito
dc.subject.otherlanguageAdditives
dc.subject.otherlanguageSintering
dc.subject.otherlanguageSnO 2
dc.subject.otherlanguageSurface excess
dc.titleSurface modification of SnO 2 nanoparticles containing Mg or Fe: Effects on sintering
dc.typeArtigo
fei.scopus.citations36
fei.scopus.eid2-s2.0-33847044379
fei.scopus.subjectMacro properties
fei.scopus.subjectSurface excess
fei.scopus.subjectSurface segregation
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33847044379&origin=inward
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