Photoluminescence of the Mg 2 Al 4 Si 5 O 18 -Al 2 O 3 -MgAl 2 O 4 -SiO 2 ceramic system containing Fe 3+ and Cr 3+ as impurity ions
| Autor: | S.S. Pedro, Lilian P. Sosman, A.R.R. Papa, A. López |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Photoluminescence Field (physics) Organic Chemistry Analytical chemistry 02 engineering and technology Radiation 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Wavelength Octahedron visual_art visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Excitation |
| Zdroj: | Optical Materials. 76:353-358 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2017.12.056 |
| Popis: | This work presents the results of photoluminescence, excitation and radiative decay time for a ceramic system containing Mg2Al4Si5O18-Al2O3-MgAl2O4-SiO2 with Fe3+ and Cr3+ as impurity ions. Emission data were obtained using several excitation wavelengths and the excitation data were acquired for the most intense emission bands. The optical results were analyzed according to the Tanabe-Sugano (TS) theory from which the crystalline field parameter Dq and Racah parameters B and C were obtained for the Fe3+ and Cr3+ sites. The results indicate that the Fe3+ and Cr3+ ions occupy tetrahedral and octahedral sites, respectively. The emission from Fe3+ and Cr3+ ions causes an intense and broad band ranging between 350 nm and 850 nm, showing that this material is a potential tunable radiation source at room temperature. |
| Databáze: | OpenAIRE |
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