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Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O3 powders

SCZANCOSKI, J. C ; CAVALCANTE, L. S ; BADAPANDA, T ; ROUT, S. K ; PANIGRAHI, S ; MASTELARO, V. R ; VARELA, J. A ; SIU LI, M ; LONGO, E

Solid state sciences, 2010-07, Vol.12 (7), p.1160-1167 [Periódico revisado por pares]

Issy-les-Moulineaux: Elsevier Masson

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Título:
Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O3 powders
Autor: SCZANCOSKI, J. C ; CAVALCANTE, L. S ; BADAPANDA, T ; ROUT, S. K ; PANIGRAHI, S ; MASTELARO, V. R ; VARELA, J. A ; SIU LI, M ; LONGO, E
Assuntos: Band spectra ; Clusters ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Exact sciences and technology ; Fourier transforms ; Optical properties ; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation ; Optical properties of bulk materials and thin films ; Photoluminescence ; Physics ; Solid state ; Spectra ; Structure of solids and liquids; crystallography ; Structure of specific crystalline solids ; Titanium dioxide ; X-rays ; Yttrium
É parte de: Solid state sciences, 2010-07, Vol.12 (7), p.1160-1167
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: [Ba1-x Y2x/3](Zr0.25Ti0.75)O3 powders with different yttrium concentrations (xaa=aa0, 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 350aanm wavelength at room temperature showed that all powders present typical broad band emissions in the blue region. Display Omitted
Editor: Issy-les-Moulineaux: Elsevier Masson
Idioma: Inglês

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Structure and optical properties of [Ba1-xY2x/3](Zr0.25Ti0.75)O3 powders

SCZANCOSKI, J. C ; CAVALCANTE, L. S ; BADAPANDA, T ; ROUT, S. K ; PANIGRAHI, S ; MASTELARO, V. R ; VARELA, J. A ; SIU LI, M ; LONGO, E

Issy-les-Moulineaux: Elsevier Masson

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