Preparation of In-doped Y2O3 ceramics through a sol-gel process

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dc.contributor.authorRICHARD, DIEGOpt_BR
dc.contributor.authorRENTERÍA, MARIOpt_BR
dc.contributor.authorCARBONARI, ARTUR W.pt_BR
dc.contributor.authorROMERO, MARIANOpt_BR
dc.contributor.authorFACCIO, RICARDOpt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2020-07-23T17:02:48Z
dc.date.available2020-07-23T17:02:48Z
dc.date.issued2020pt_BR
dc.description.abstractThe Pechini-type sol-gel (PSG) process has been used for the preparation of doped oxides due to its capability to overcome most of the difficulties that frequently occur by using other producing methods. In this work we analyze the case of samples of pure and In-doped yttria (Y2O3) prepared by the PSG process. We experimentally characterize the synthesized samples by x-ray diffraction, micro-Raman spectroscopy, electrochemical impedance spectroscopy (EIS), and time-differential perturbed γ-γ angular correlation (PAC) spectroscopy, and we compare these results with those obtained starting from commercial oxide powders. We found that the PSG process can be used to successfully produce doped yttria in the cubic phase, with the impurities substitutionally located at the cationic sites of the structure. By the proposed PSG route, the inclusion of impurities does not affect the particle size nor the resistivity. However, when we compare the PSG samples with other samples produced from commercial powder, we found that the first have lower resistivities at grain interiors. On the other hand, PAC spectroscopy in 111In(→111Cd)-doped yttria allows the study of the dynamic hyperfine interactions observed by the radioactive 111Cd impurity-probe, which can be used to “sense” the host electron availability near the impurities after the electron-capture decay of 111In. Differences between PAC spectra for PSG samples and the commercial powder suggest that the PSG process introduces additional donor defects into the yttria electronic structure, which is consistent with the lower resistivity observed in the PSG samples by EIS spectroscopy.pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipIDCNPq: 305046/2013-6pt_BR
dc.description.sponsorshipIDFAPESP: 14/14001-1pt_BR
dc.format.extent16088-16095pt_BR
dc.identifier.citationRICHARD, DIEGO; RENTERÍA, MARIO; CARBONARI, ARTUR W.; ROMERO, MARIANO; FACCIO, RICARDO. Preparation of In-doped Y2O3 ceramics through a sol-gel process: effects on the structural and electronic properties. <b>Ceramics International</b>, v. 46, n. 10, p. 16088-16095, 2020. DOI: <a href="https://dx.doi.org/10.1016/j.ceramint.2020.03.161">10.1016/j.ceramint.2020.03.161</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31356.
dc.identifier.doi10.1016/j.ceramint.2020.03.161pt_BR
dc.identifier.fasciculo10pt_BR
dc.identifier.issn0272-8842pt_BR
dc.identifier.orcid0000-0002-4499-5949pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4499-5949
dc.identifier.percentilfi91.38pt_BR
dc.identifier.percentilfiCiteScore83.00
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31356
dc.identifier.vol46pt_BR
dc.relation.ispartofCeramics Internationalpt_BR
dc.rightsopenAccesspt_BR
dc.subjectoxides
dc.subjectimpurities
dc.subjectsemiconductor materials
dc.subjectceramics
dc.subjectsol-gel process
dc.subjectdoped materials
dc.subjectcrystal doping
dc.subjectelectrochemistry
dc.subjectimpedance
dc.subjecthyperfine structure
dc.subjectinteractions
dc.subjectraman spectra
dc.subjectspectroscopy
dc.subjectperturbed angular correlation
dc.titlePreparation of In-doped Y2O3 ceramics through a sol-gel processpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorARTUR WILSON CARBONARI
ipen.codigoautor1437
ipen.contributor.ipenauthorARTUR WILSON CARBONARI
ipen.date.recebimento20-07
ipen.identifier.fi4.527pt_BR
ipen.identifier.fiCiteScore6.9
ipen.identifier.ipendoc27130pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi4.500 - 5.999
ipen.range.percentilfi75.00 - 100.00
ipen.subtituloeffects on the structural and electronic propertiespt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication8f236231-e73c-4182-a596-d83e49cd0404
relation.isAuthorOfPublication.latestForDiscovery8f236231-e73c-4182-a596-d83e49cd0404
sigepi.autor.atividadeCARBONARI, ARTUR W.:1437:310:Npt_BR
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