Magnetite microcrystals for magneto-rheological fluids

We report a new synthetic method for the preparation of micrometric prismatic crystals of magnetite by means of a coprecipitation reaction of aqueous solutions of iron salts and ammonium oxalate, followed by thermal decomposition of the precipitate in an inert atmosphere. Magnetite prismatic crystal...

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Bibliographic Details
Published inThe Journal of physics and chemistry of solids Vol. 66; no. 6; pp. 927 - 931
Main Authors Mendoza, M.E., Donado, F., Silva, R., Pérez, M.A., Carrillo, J.L.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.06.2005
Elsevier
Subjects
A. Magnetic materials
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Growth from solutions
Materials science
Methods of crystal growth; physics of crystal growth
Physics
A. Magnetic materials
Magnetite
Aqueous solutions
Thermal decomposition
Magnetic domains
Crystal growth from solutions
Iron oxides
Microstructure
Microcrystal
Coprecipitation
Magnetorheological fluid
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Summary:We report a new synthetic method for the preparation of micrometric prismatic crystals of magnetite by means of a coprecipitation reaction of aqueous solutions of iron salts and ammonium oxalate, followed by thermal decomposition of the precipitate in an inert atmosphere. Magnetite prismatic crystals grown by this procedure are homogeneous in size and morphology. We also study the structure and orientation of the magnetic domains.
ISSN:0022-3697
1879-2553
DOI:10.1016/j.jpcs.2004.06.019