| 简介 |
In a method for producing an artificial permanent magnet, in a powder preparation step a main phase powder, which comprises a rare-earth transition metal compound with permanently magnetic properties and has a first average particle size, is prepared and an anisotropic powder, which has a higher anisotropy field strength than the main phase powder and has a second average particle size, is prepared, wherein the second average particle size is smaller than the first average particle size. In a subsequent powder mixing step, the main phase powder and the anisotropic powder are mixed together to form a powder mixture and, in a subsequent heat treatment step, this powder mixture is sintered with the main phase powder of the first average particle size and with the anisotropic powder of the second average particle size to form an artificial permanent magnet (5). The main phase powder preferably contains an SE2 (Fe, X) 14B compound, where SE denotes rare earth elements, Fe denotes iron, B denotes boron and X denotes any desired chemical element including iron or a number of any desired chemical elements. The first average particle size of the main phase powder is advantageously over 50% larger than the second average particle size, preferably over 100% larger than the second average particle size of the anisotropic powder. |
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