| dc.contributor | Universidade Estadual Paulista (Unesp) | |
| dc.contributor | Universidade de São Paulo (USP) | |
| dc.date.accessioned | 2014-05-20T15:31:03Z | |
| dc.date.available | 2014-05-20T15:31:03Z | |
| dc.date.created | 2014-05-20T15:31:03Z | |
| dc.date.issued | 2008-11-01 | |
| dc.identifier | Journal of Luminescence. Amsterdam: Elsevier B.V., v. 128, n. 11, p. 1787-1790, 2008. | |
| dc.identifier | 0022-2313 | |
| dc.identifier | http://hdl.handle.net/11449/40295 | |
| dc.identifier | 10.1016/j.jlumin.2008.04.011 | |
| dc.identifier | WOS:000259158500010 | |
| dc.identifier | 4284809342546287 | |
| dc.description.abstract | This paper reports on the effect of glass ceramic silica matrix on [CrO4](4-) and Cr2O3 NIR and visible luminescence. Chromium-containing silica was obtained by precipitation from water-glass and chromium nitrate acid solution with thermal treatment at 1000 degrees C. From XRD results silica and silica-chromium samples are crystalline. The chromium emission spectrum presents two main broad bands: one in the NIR region (1.1-1.7 mu m) and other in the visible region (0.6-0.7 mu m) assigned to Cr4+ and to Cr3+, respectively. This thermal treated glass ceramic silica-chromium sample stabilizes the [CrO4](4-) where Cr4+ substitutes for Si4+ and also hexacoordinated Cr3+ group probably as segregated phase in the system. It can be pointed out that luminescence spectroscopy is a powerful toot for detecting the two chromium optical centers in the glass ceramic silica. (C) 2008 Elsevier B.V. All rights reserved. | |
| dc.language | eng | |
| dc.publisher | Elsevier B.V. | |
| dc.relation | Journal of Luminescence | |
| dc.relation | 2.732 | |
| dc.relation | 0,694 | |
| dc.rights | Acesso restrito | |
| dc.source | Web of Science | |
| dc.subject | silica | |
| dc.subject | Chromium(III) and (IV) | |
| dc.subject | VIS and NIR luminescence | |
| dc.title | Cr3+ and Cr4+ luminescence in glass ceramic silica | |
| dc.type | Artículos de revistas | |
