| Revue: | Revista mexicana de física |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000425391 |
| ISSN: | 0035-001X |
| Autores: | Mariscal Becerra, L1 Carmona Téllez, S2 Vázquez Arreguín, R3 García Rosas, C.M4 Falcony, C1 Murrieta, H2 Sánchez Alejo, M.A2 |
| Instituciones: | 1Instituto Politécnico Nacional, Centro de Investigación y de Estudios Avanzados, Ciudad de México. México 2Universidad Nacional Autónoma de México, Instituto de Física, Ciudad de México. México 3Instituto Politécnico Nacional, Escuela Superior de Cómputo, Ciudad de México. México 4Universidad Nacional Autónoma de México, Facultad de Ciencias, Ciudad de México. México |
| Año: | 2016 |
| Periodo: | Jul-Ago |
| Volumen: | 62 |
| Número: | 4 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, teórico |
| Resumen en inglés | Different emission intensities presented in aluminum oxide phosphors corresponding to different concentrations of doping performed with terbium are analyzed. The phosphors were synthesized by the evaporation technique and were characterized by photo and cathodoluminescence, x-ray diffraction, and EDS techniques for different incorporation percentages of terbium as dopant; they show characteristic transitions in 494, 543, 587 and 622 nm, corresponding to 5D 4 → 7F 6, 5D 4 → 7F 5, 5D 4 → 7F 4 and 5D 4 → 7F 3, respectively when they are excited with λ e x c = 380 nm wavelength at room temperature. The results of XRD show the presence of α-Al 2O 3 phases with peaks located at 2 θ = 25.78, 35.34, 37.96, 43.56, 45.8, 52.74, 57.7, 61.5, 66.74, 68.44, 77.12 and 80.94, and the δ-Al 2O 3 phase 2 θ = 32.82, 45.8, 61.36 and 66.74. These compounds were heat treated for two hours at 1100 ∘ C. EDS analyzes indicate that these compounds have close to 60% oxygen around of 40% aluminum in the presence of terbium as dopant which indicates a stoichiometry close to the expected one for alumina |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física, Terbio, Luminiscencia, Polvos |
| Keyword: | Oxido de aluminio, Physics, Terbium, Luminescence, Powders, Aluminum oxide |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
