Publicação: Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powders
dc.contributor.author | Sczancoski, J. C. | |
dc.contributor.author | Cavalcante, L. S. [UNESP] | |
dc.contributor.author | Badapanda, T. | |
dc.contributor.author | Rout, S. K. | |
dc.contributor.author | Panigrahi, S. | |
dc.contributor.author | Mastelaro, V. R. | |
dc.contributor.author | Varela, José Arana [UNESP] | |
dc.contributor.author | Li, M. Siu | |
dc.contributor.author | Longo, Elson [UNESP] | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor.institution | Natl Inst Technol | |
dc.contributor.institution | Birla Inst Technol | |
dc.contributor.institution | Universidade de São Paulo (USP) | |
dc.date.accessioned | 2014-05-20T15:32:09Z | |
dc.date.available | 2014-05-20T15:32:09Z | |
dc.date.issued | 2010-07-01 | |
dc.description.abstract | [Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powders with different yttrium concentrations (x = 0, 0.025 and 0.05) were prepared by solid state reaction. These powders were analyzed by X-ray diffraction (XRD). Fourier transform Raman scattering (FT-RS), Fourier transform infrared (FT-IR) and X-ray absorption near-edge (XANES) spectroscopies. The optical properties were investigated by means of ultraviolet-visible (UV-vis) absorption spectroscopy and photoluminescence (PL) measurements. Even with the addition of yttrium, the XRD patterns revealed that all powders crystallize in a perovskite-type cubic structure. FT-RS and FT-IR spectra indicated that the presence of [YO6] clusters is able to change the interaction forces between the O-Ti-O and O-Zr-O bonds. XANES spectra were used to obtain information on the off-center Ti displacements or distortion effects on the [TiO6] clusters. The different optical band gap values estimated from UV-vis spectra suggested the existence of intermediary energy levels (shallow or deep holes) within the band gap. The PL measurements carried out with a 350 nm wavelength at room temperature showed that all powders present typical broad band emissions in the blue region. (C) 2010 Elsevier Masson SAS. All rights reserved. | en |
dc.description.affiliation | Univ Estadual Paulista, BR-14801907 Araraquara, SP, Brazil | |
dc.description.affiliation | Universidade Federal de São Carlos (UFSCar), BR-13565905 São Carlos, SP, Brazil | |
dc.description.affiliation | Natl Inst Technol, Dept Phys, Rourkela 769008, India | |
dc.description.affiliation | Birla Inst Technol, Dept Appl Phys, Ranchi 835215, Bihar, India | |
dc.description.affiliation | Univ São Paulo, IFSC, BR-13560970 São Carlos, SP, Brazil | |
dc.description.affiliationUnesp | Univ Estadual Paulista, BR-14801907 Araraquara, SP, Brazil | |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
dc.description.sponsorship | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | |
dc.description.sponsorship | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | |
dc.description.sponsorship | Laboratório Nacional de Luz Síncrotron (LNLS) | |
dc.description.sponsorshipId | FAPESP: 09/50303-4 | |
dc.description.sponsorshipId | LNLS: D04B - XAFS1 - 8823 | |
dc.format.extent | 1160-1167 | |
dc.identifier | http://dx.doi.org/10.1016/j.solidstatesciences.2010.04.002 | |
dc.identifier.citation | Solid State Sciences. Amsterdam: Elsevier B.V., v. 12, n. 7, p. 1160-1167, 2010. | |
dc.identifier.doi | 10.1016/j.solidstatesciences.2010.04.002 | |
dc.identifier.issn | 1293-2558 | |
dc.identifier.uri | http://hdl.handle.net/11449/41132 | |
dc.identifier.wos | WOS:000280381200021 | |
dc.language.iso | eng | |
dc.publisher | Elsevier B.V. | |
dc.relation.ispartof | Solid State Sciences | |
dc.relation.ispartofjcr | 1.861 | |
dc.relation.ispartofsjr | 0,574 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Web of Science | |
dc.subject | Ba(Zr,Ti)O-3 | en |
dc.subject | Vacancies | en |
dc.subject | Lattice defects | en |
dc.subject | Band gap | en |
dc.subject | Photoluminescence | en |
dc.title | Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O-3 powders | en |
dc.type | Artigo | |
dcterms.license | http://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy | |
dcterms.rightsHolder | Elsevier B.V. | |
dspace.entity.type | Publication | |
unesp.campus | Universidade Estadual Paulista (UNESP), Instituto de Química, Araraquara | pt |
unesp.department | Bioquímica e Tecnologia - IQAR | pt |
unesp.department | Físico-Química - IQAR | pt |
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