Incorporação de óxido de cério em vidros teluritos para o desenvolvimento de dispositivos ópticos

• Ano de defesa: 2019
• Autor(a) principal: Silva, Edenilson da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Pato Branco; Brasil; Programa de Pós-Graduação em Tecnologia de Processos Químicos e Bioquímicos; UTFPR
• Palavras-chave em Português: Vidro - Propriedades ópticas; Análise térmica; Detectores ópticos; Glass - Optical properties; Thermal analysis; Optical detectors; CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::PROCESSOS INDUSTRIAIS DE ENGENHARIA QUIMICA; Engenharia/Tecnologia/Gestão
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/4493

The effects of Cerium incorporation in a Zinc-Tellurite glass containing Sodium and Lanthanum (TZNL) has been investigated. Samples were produced under air atmosphere and thermal, structural and spectroscopic data was acquired. The doped samples exhibited a reddish luminescence under 405 nm excitation, though its origin is attributed to Te4+ions. Under 450 nm pumping we observed a broadband from 600-750nm in all samples, including the matrix. X-ray diffractograms (XRD) andFourier transform infrared spectroscopy (FT-IR) analysis confirmed that Cerium is inducing structural changes in the glass and even though Ce3+were not detected directly, its presence is not discarded because the excitation of the Te4+band observed in the TZNL glass is different from the reported in the literature in such way that Ce3+may playing some role. An additional excitation/emission study is needed in order to clarify the question.