Journal of Materials Science

, Volume 25, Issue 7, pp 3249–3254 | Cite as

Aqueous ferrofluids based on manganese and cobalt ferrites

  • Francisco Augusto Tourinho
  • Raymonde Franck
  • René Massart
Papers

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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Copyright information

© Chapman and Hall Ltd 1990

Authors and Affiliations

  • Francisco Augusto Tourinho
    • 1
  • Raymonde Franck
    • 1
  • René Massart
    • 1
  1. 1.Laboratoire de Physicochimie Inorganique (Associé au C.N.R.S.-U.A. 419)Université Pierre et Marie Curie, Bâtiment F, 5ème étageParis Cedex 05France

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