| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1622846 | Journal of Alloys and Compounds | 2009 | 6 Pages |
Abstract
Photoluminescence (PL) at room temperature was observed in BaWO4 powders processed in microwave-hydrothermal at 140 °C for different times. The phases were characterized by X-ray diffraction (XRD) and Fourier transform Raman (FT-Raman) measurements. XRD and FT-Raman analyses revealed that the BaWO4 powders present a tetragonal structure and free of deleterious phases. Ultraviolet–visible absorption spectroscopy was employed to determine the optical band gap of this material. PL measurements at room temperature showed a maximum emission at around 543 nm (green emission) when excited with 488 nm wavelength. PL behavior was attributed to the existence of distortions on the [WO4] tetrahedron groups caused by microwave radiation.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
L.S. Cavalcante, J.C. Sczancoski, J.W.M. Espinosa, J.A. Varela, P.S. Pizani, E. Longo,