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Aqueous ferrofluids based on manganese and cobalt ferrites

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Abstract

Synthesis of two new aqueous ferrofluids is performed chemically according to Massart's procedure. Manganese and cobalt ferrite magnetic particles are precipitated and treated in order to obtain colloidal sols by creating a charge density on their surface. Such “ionic” ferrofluids can be prepared in an acidic (after a treatment by ferric nitrate) or in an alkaline medium at a concentration as high as 17moll−1, i.e. a volumic fraction of 0.26. This result makes these new compounds of great interest.

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Authors and Affiliations

  1. Laboratoire de Physicochimie Inorganique (Associé au C.N.R.S.-U.A. 419), Université Pierre et Marie Curie, Bâtiment F, 5ème étage, 4 place Jussieu, 75252, Paris Cedex 05, France

    Francisco Augusto Tourinho, Raymonde Franck & René Massart

Authors
  1. Francisco Augusto Tourinho
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  2. Raymonde Franck
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  3. René Massart
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Tourinho, F.A., Franck, R. & Massart, R. Aqueous ferrofluids based on manganese and cobalt ferrites. J Mater Sci 25, 3249–3254 (1990). https://doi.org/10.1007/BF00587682

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  • DOI: https://doi.org/10.1007/BF00587682

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