japan's aichi steel corporation has developed a complex of rare earth anisotropic bonded magnet and the magnet manufacturing methods, and has obtained patents for inventions.
detailed description of the patent in such a magnet, the average particle size and composition of the composition, magnetic activator from the surface coated with low-cobalt rare-earth d-hddr coarse powder, the surface coated with another active agent, as well as resin-bonded rare-earth magnetic thin agent of three parts. surrounded by resin as a buffer in the low cobalt rare-earth magnetic powder of the d-hddr rough outside the small rare-earth magnetic powder being evenly distributed in the resin. while this invention of low-co rare-earth magnetic powder yi d-hddr coarse fragmentation, thereby causing oxidation, but the magnets have high magnetic properties and excellent thermal performance.