Estudo das propriedades dielétricas da hexaferrita Ba2Co2Fe12O22 (Co2Y) com adição de óxido de vanádio (V2O5)

• Ano de defesa: 2015
• Autor(a) principal: Miranda, João Roberto Sousa de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Instituto de Física (IF); UFMT CUC - Cuiabá; Programa de Pós-Graduação em Física
• Palavras-chave em Português: Hexaferrita; Cerâmicas; Espectroscopia de impedância; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA; Hexaferrite; Ceramic; Impedance spectroscopy
• Link de acesso: http://ri.ufmt.br/handle/1/705

The present work treat dielectric, structural and morphological properties of hexaferritas Ba2Co2Fe12O22 (Co2Y) with addition of the 0,25; 0,50; 0,75 e 1,00% of the Vanadium Oxide (V2O5), during its mixing powders embodiment were produced from the solid state reaction method or ceramic traditional. The records collected point out that in recent decades the magnetic ceramics ((hexaferrites) It has been established as ceramic materials with strong attractive for use in electronic devices that require high efficiency, noting that the main advantages offered by these ceramics are possibility of miniaturization or compactness and low cost manufacturing, besides being formed of lightweight materials and thermally stable. It is essential to mention that the ferrites stand out because they have high dielectric constant and low dielectric loss and which arouses great interest in the telecommunications industry, and after calcination, the samples were doped and macerated in a crucible, they were then formed into samples which presses were obtained in the form of cylindrical pellets. The method used for structural analysis of samples was performed by means of diffraction technique of X ray and the morphological study was carried out through visual scanning electron microscopy analysis where it could prove the relationship between microstructure and densities of the samples obtained by Archimedes method. . Research has dielectric characteristics as occurring in the frequency range since 1 Hz to 1 MHz and temperature range 30°C to 200°C in order to obtain and analyze ceramic material with potential application in electronic devices. The study notes that the initial objective of the research was to obtain a high dielectric constant material with low dielectric loss and thermal stability.