H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 1/00 (2006.01) B01J 13/00 (2006.01) B03C 1/01 (2006.01) G01N 33/543 (2006.01) G11B 5/712 (2006.01) H01F 1/44 (2006.01)
Patent
CA 2320940
The invention relates to new single- or multi-metallic magnetic colloid particles (for example, Fe, Co, Ni, Fe/Co) having a size of up to 20 nm, the surface of which is protected against corrosion by precious metals, such as Pd, Ag, Pt or Au. The invention also relates to a method for producing said materials. In isolated form or in solution said materials are used among other things as sealing media against dust and gas in magnetic fluid seals (liquid O ring), for lubricating and mounting rotating shafts (magnetic levitation bearing), for the magnetooptic storage of information as well as for the magnetic marking of cells and their separation in biological samples or for the local administration of medicines.
L'invention concerne de nouvelles particules colloïdales magnétiques mono- et multimétalliques (par exemple Fe, Co, Ni, Fe/Co) d'une taille atteignant 20 nm, dont la surface est protégée contre la corrosion par des métaux précieux tels que Pd, Ag, Pt ou Au. L'invention concerne également un procédé pour produire lesdits matériaux. Sous forme isolée ou en solution, ces matériaux sont utilisés comme substances de scellement contre la poussière et les gaz dans des joints hydrauliques magnétiques (joint torique hydraulique), pour la lubrification et la suspension d'arbres rotatifs (palier à suspension magnétique), pour le stockage magnéto-optique d'informations ainsi que pour le marquage magnétique de cellules et leur séparation dans des échantillons biologiques, ou encore pour l'administration locale de médicaments.
Bonnemann Helmut
Brijoux Werner
Brinkmann Rainer
Wagener Michael
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung
Studiengesellschaft Kohle Mbh
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