| 摘要 |
PURPOSE:To manufacture the permanent magnet having both excellent magnetic characteristics and corrosion-resisting property by a method wherein rareearth- iron magnetic powder is coupling-treated using silane or titanate coupling agent, and it is molded after mixing with resin. CONSTITUTION:The rareearth-iron magnetic powder manufactured by performing a superquenching treatment is coupling-treated using a titanate coupling agent. In this case, when the coupling treatment is going to be performed, various kinds of silane coupling agents and titanate coupling agents are properly diluted using the solvent such as alcohol, toluene and the like, and it is dried up. After the above-mentioned material has been dried up, the coupling-treated magnetic powder is mixed with thermosetting resin and thermoplastic resin, and the molded body of the prescribed shape is formed by performing a compression molding or an injection molding operation. Then, a curing treatment is performed on the molded body as occasion demands. As the material magnetic powder is coupling-treated using a silane or titanate coupling agent, the obtained permanent magnet has excellent corrosion-resisting property, and the deterioration in magnetic characteristics caused by the generation of corrosion can be prevented. |
