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http://acervodigital.unesp.br/handle/11449/66625- Title:
- Magnetic properties of spindle-type iron fine particles obtained from hematite
- Universidade Estadual Paulista (UNESP)
- Universidade de São Paulo (USP)
- 0304-8853
- 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.
- 1-Dec-2001
- Journal of Magnetism and Magnetic Materials, v. 226-230, n. PART II, p. 1933-1935, 2001.
- 1933-1935
- 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
- http://dx.doi.org/10.1016/S0304-8853(00)00668-5
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/66625
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