Análise dielétrica e magnética da eletrocerâmica Ba2Co2Fe12O22 adicionada com PbO para aplicações em componentes eletrônicos

• Autor(a) principal: Pires Júnior, Guilherme Francisco de Morais
• Data de Publicação: 2010
• Outros Autores: Rodrigues, Herbert de Oliveira, Sales, Juscelino Chaves, Ferreira, Alisson da Conceição, Sancho, Emmanuelle de Oliveira, Sombra, Antônio Sérgio Bezerra
• Tipo de documento: Artigo de conferência
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/61359
• topic: Difração de raios - X; Eletrocerâmicas; Reação de estado - Sólido

The objective of this work is to study the dielectric and magnetic properties of electroceramics (Ba2Co2Fe12O22 - Co2Y) added with (3; 5 and 10 wt%) of PbO in order to promote better dielectric and magnetic properties for applications in electronics. Phase Co2Y was obtained through the method of solid-state reaction. The analysis for X-Ray Diffraction (XRD) using Rietveld refinement confirmed the formation of isolated electroceramics Ba2Co2Fe12O22 with hexagonal crystal structure (a = b = 5.8560 Å and c = 43.4970 Å, α = β = 90 ° and γ = 120 °). The magnetic characteristics were investigated and the magnetic hysteresis curves, and the values of saturation magnetization, remnant force and strength coercivity were obtained. The study of dielectric properties as a function of frequency in the range of 100 -100 MHz at room temperature by impedance spectroscopy showed that these properties are strongly dependent on the frequency and the addition of PbO. The effect of binder PVA (polyvinyl alcohol) on the properties of Co2Y was also studied.