Publicação: Structural and magnetic characterization of MnxZn1-xFe2O4 (x=0.2; 0.35; 0.65; 0.8; 1.0) ferrites obtained by the citrate precursor method
Nenhuma Miniatura disponível
Data
2012-01-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
In this work the microstructure and magnetic properties of Mn-Zn ferrites powders were investigated. Mn(x)Zn1 - xTe2O4 powders where x = 0.2; 0.35; 0.5; 0.65; 0.8 and 1.0 were obtained by citrate precursor method. Citrate resin precursor was burned on air atmosphere at 400 degrees C for 3 h. Mn-Zn powders were calcined at 950 degrees C during 150 min under inert atmospheres: N-2 and rarefied atmosphere. Thermal analysis of precursor resin, phase evolution and microstructure of Mn-Zn ferrites powders were investigated by TG, DTA, XRD and SEM techniques. The powders calcined under rarefied atmosphere show spinet cubic structure and contamination of alpha-Fe2O3, while powders calcined under N-2 presents only the spinel cubic structure. Particle size was observed by SEM ranging from 80 to 150 nm. The magnetic properties were measured employing a vibrating sample magnetometer (VSM). It was observed that the saturation magnetization M-s increased with the increase of Mn content. The M-s of Mn0.8Zn0.2Fe2O4 calcined on rarefied atmosphere and Mn0.8Zn0.2Fe2O4 calcined on N-2 was 23.31 emu g(-1) and 56.23 emu g(-1), respectively. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Ceramics International. Oxford: Elsevier B.V., v. 38, n. 1, p. 741-746, 2012.
