Síntese de cerâmicas porosas de Al2O3 e sua aplicação como microcavidades ópticas

• Ano de defesa: 2013
• Autor(a) principal: Matos, Silvaneide de Jesus
• Orientador(a): Rodrigues Júnior, José Joatan
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Programa de Pós-Graduação: Pós-Graduação em Física
• Palavras-chave em Português: Física; Difração; Raios X; Raios laser; Análise térmica; Material cerâmico; Cerâmica; Cloreto de alumínio; Difração de raios X; Sol-gel
• Palavras-chave em Inglês: Aluminum chloride; Ceramic materials; Difration; Physics; Thermal analysis; X-rays
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://ri.ufs.br/handle/riufs/5291

Studies on porous ceramics have a great technological and scientific interest because they are related to catalysis, control of pollutant particulates (aerosols), and powder metallurgy, among many other applications. In this context, the pursuit of new porous ceramic structures that exhibit a greater efficiency of certain properties has been very intense recently. In this work we develop alumina porous ceramic named ceramic foams that were investigated as microcavities in optical applications. Alumina nanoparticles were synthesized by a proteic sol-gel route with low level of toxicity and transformed into ceramic foams consisting of a network of pores with diameters ranging from 0.8 mm to 10 mm, depending on the processing parameters used. Fluorescence measurements in such samples with pores filled by organic dyes rhodamine B and rhodamine 6G exhibited emission characteristic of random laser.