Magnetic properties of spindle-type iron fine particles obtained from hematite
Carregando...
Fontes externas
Fontes externas
Data
Autores
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier
Tipo
Artigo
Direito de acesso
Acesso restrito
Fontes externas
Fontes externas
Resumo
Spindle-type iron fine particles have been prepared by reduction of silica-coated-hematite particles. Hydrogen reduction of the coated-hematite cores yielded uniform spindle-type iron particles, which were stabilized by surface oxidation. Narrow particle distributions are observed from TEM measurements. X-ray, Mössbauer and magnetization data are in agreement with the presence of nanosized α-Fe particles, having surface layer of spinel structure oxide. Mössbauer spectra show that the oxide surface is superparamagnetic at room temperature. © 2001 Elsevier Science B.V. All rights reserved.
Descrição
Palavras-chave
Fine particles Iron particles Magnetic pigments Magnetic recording media Hematite particles Hydrogen reduction Iron-fines Magnetization data Mossbauer Nano-sized Oxide surface Particle distributions Room temperature Silica-Coated Spinel structure Superparamagnetics Surface layers Surface oxidations TEM Hematite Iron ores Magnetic devices Magnetic properties Magnetic recording Magnetism Molybdenum oxide Reaction kinetics Silica Superparamagnetism Surface structure Magnetic bubbles
Idioma
Inglês
Citação
Journal of Magnetism and Magnetic Materials, v. 226-230, n. PART II, p. 1933-1935, 2001.
