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DC Field | Value | Language |
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dc.contributor.author | Costa, Vilma Conceição | |
dc.contributor.author | Lameiras, Fernando Soares | |
dc.contributor.author | Pinheiro, Maurício V. Brant | |
dc.contributor.author | Sousa, D.F. | |
dc.contributor.author | Nunes, L.A.O. | |
dc.contributor.author | Shen, Y.R. | |
dc.contributor.author | Bray, K.L. | |
dc.date.accessioned | 2016-08-29T18:47:38Z | - |
dc.date.available | 28-9-2010 | |
dc.date.available | 2016-08-29T18:47:38Z | - |
dc.date.issued | 2000 | |
dc.identifier.issn | ISSN 0022-3093 | |
dc.identifier.uri | http://www.repositorio.cdtn.br:8080/jspui/handle/123456789/535 | - |
dc.description.abstract | Gels and glasses in the SiO2-Al2O3-ZnO-Cr2O3 and SiO2-Al2O3-MgO-Cr2O3 systems were synthesized by the sol-gel method. A description of the change of the Cr3. environment during the xerogel-glass-glass ceramic transformation is presented using optical properties of Cr3. ions. Absorption and emission spectra, electron paramagnetic resonance measurements, and site-selective laser spectroscopy were performed to characterize the Cr3 + fluorescent centers. Absorption and fluorescence are interpreted by structural considerations showing the variation of Cr3+ environment during heat treatment. By heating glasses, the glass-ceramics containing chromium-doped ZnAl2O4 (gahnite) are formed. The results indicate the presence of chromium ions in a gahnite crystalline phase and emission from the 2E level is observed. Also a Cr3+ fluorescence centered at 770 nm results from 4T2 level of Cr3+ sites at low ligand field in glassy phase. phase. | |
dc.language.iso | Inglês | |
dc.rights | L | |
dc.subject | Gels | |
dc.subject | glasses | |
dc.subject | synthesis | |
dc.subject | sol-gel process | |
dc.subject | laser spectroscopy | |
dc.subject | electron spin resonance | |
dc.title | Laser spectroscopy and electron paramagnetic resonance of Cr3+ doped silicate glasses | |
dc.type | Artigo Periódico | |
dc.creator.affiliation | Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil | |
dc.creator.affiliation | Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil | |
dc.creator.affiliation | Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil | |
dc.creator.affiliation | Instituto de Física de São Carlos, USP, São Carlos, Brasil | |
dc.creator.affiliation | Instituto de Física de São Carlos, USP, São Carlos, SP, Brasil | |
dc.creator.affiliation | Washington State University, Pullman, WA, USA | |
dc.creator.affiliation | Washington State University, Pullman, WA, USA | |
dc.identifier.fasciculo | 1-3 | |
dc.identifier.vol | 273 | |
dc.identifier.extent | p.209-214 | |
dc.title.journal | Journal of Non-Crystalline Solids Amsterdam | |
Appears in Collections: | Artigo de periódico |
Files in This Item:
File | Description | Size | Format | |
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Art-01_Vilma_CCosta.pdf | 147.86 kB | Adobe PDF | View/Open |
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