Síntese e caracterização de compostos do sistema x/2 Al²O³-x/2 Y²O³ (100 - x) SiO² (x=10,20,30,40 e 50) dopados com Er³+ para aplicação em fotônica

• Autor(a) principal: OLIVEIRA, Alexandre Miranda de
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/809
• topic: Materiais luminescentes; Sistema Al² O³ - Y² O³ - SiO² 3; Sol-Gel/ Pechini; Amplificação óptica; 1. Materiais luminescentes 2. Sistema AL²O³-Y²O³-SiO² 3. Sol-Gel/Pechini 4.Amplicação óptica; Luminescent materials; SystemAl Al² O³ - Y² O³ - SiO² 3 Sol-Gel/Pechini; Optical amplification.; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA

This work is to study the crystallization of compounds in the form of post system alumina-yttria-silica prepared by sol-gel mixed methodology and Pechini. Powders (x / 2) Y ² ³ - (X / 2) Al ² O ³ - (1-x) SiO ² (x = 0.1 0.2, 0.3, 0.4 and 0.5 mol) were doped with erbium prepared and characterized. The physical properties of composite SiO ² ¹ YO-, 5 - AlO ¹, 5 were studied by x-ray diffraction, FTIR spectroscopy, thermogravimetry, differential thermal analysis and photoluminescence measurements. It was possible to maintain the amorphous compositions at high temperatures, no crystallization below 900 ° C and the formation of phase Y ² ² O7 Si at 1100 ° C. We obtained a reasonable life time of some compositions treated at 1000 ° C. We observed the emission of green upconversion to excite the samples with high power laser. All synthesized samples exhibit photoluminescence emission and have maximum emission at 1530 nm with a width of ~ 47nm. This broad issue is a desirable property for amplifiers used in systems division multiplexing wavelengths (WDM) and suggests that Er ³ + ions are hosted in the amorphous phase.