Fluids magnetic, in particular ferrofluids, and for their preparation

摘要

New ferrofluids. / p & & p & they are essentially of an aqueous solution of polyoxoanions of fe (iii) and, at least one metal to the grade of oxidation ii of the first series of transition metals, with a cation associated, in particular chosen from: & br / (see appended drawing in bopi) & br / / p & & p & application in particular in the embodiment of the systems of the levitation or of self - lift, as well as in the embodiment of the contactors or passages is rotating.