A method for the production of a permanent magnet, as well as permanent magnet and electrical machine having a

摘要

The present invention relates to a process for the production of a permanent magnet (20), comprising the steps of:(a) preparing a mixture (13) comprising– a powder (10) of a magnetic material (12) as well as– a binder composition (14), the at least one precursor compound for the silicon oxide and at least one precursor of a further oxide comprises,(b) formation of the mixture (13) to a green part (15);(c) heat treatment of the green component is removed (15) for the transfer of at least parts of the binder composition (14) into the oxides, and(d) in succession to or simultaneously with step (c) sintering the green component is removed (15) with the formation of a glass -, ceramic - or glass ceramic matrix (21) of the oxides, which the particles (11) of the magnetic material (12), it is possible to embed.The method, which can be produced with the permanent magnet (20) comprises cores (15) of a permanent magnetic material (12) having an average particle diameter of at most 1 μm and a matrix (21) of a diamagnetic or paramagnetic material (22), in which the cores (15) are embedded.