dc.contributor | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T15:32:38Z | |
dc.date.available | 2014-05-20T15:32:38Z | |
dc.date.created | 2014-05-20T15:32:38Z | |
dc.date.issued | 2009-02-01 | |
dc.identifier | Crystal Growth & Design. Washington: Amer Chemical Soc, v. 9, n. 2, p. 1002-1012, 2009. | |
dc.identifier | 1528-7483 | |
dc.identifier | http://hdl.handle.net/11449/41485 | |
dc.identifier | 10.1021/cg800817x | |
dc.identifier | WOS:000263048200056 | |
dc.description.abstract | This paper reports on the synthesis of barium tungstate (BaWO4) powders obtained by the coprecipitation method and processed in a domestic microwave-hydrothermal (MH) at 413 K for different times. These powders were analyzed by X-ray diffraction (XRD), Fourier transform Raman (FT-Raman) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and fieldemission gun scanning electron microscopy (FEG-SEM). XRD patterns showed that the BaWO4 powders present a scheelite-type tetragonal structure and free of secondary phases. FT-Raman spectra proved the evidence of a tetragonal structure due to W-O stretching vibration into the [WO4] tetrahedron groups. FT-IR spectra revealed a strong shoulder on the nu(3) bands in the transmittance spectra of the powders. FEG-SEM micrographs indicated that the powders present an octahedron-like morphology with agglomerated nature and polydisperse particle size distribution. The morphological evolution of BaWO4 powders with the processing time in a MH system was investigated and a possible growth mechanism was proposed. A green photoluminescence (PL) emission at room temperature was verified for the BaWO4 powders when exited by 488 nm wavelength. Finally, a model was proposed to explain this physical property. | |
dc.language | eng | |
dc.publisher | Amer Chemical Soc | |
dc.relation | Crystal Growth & Design | |
dc.relation | 3.972 | |
dc.relation | 1,154 | |
dc.rights | Acesso restrito | |
dc.source | Web of Science | |
dc.title | Synthesis, Characterization, Anisotropic Growth and Photoluminescence of BaWO4 | |
dc.type | Artículos de revistas | |