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    • 172. 发明授权
    • Rare-earth bonded magnet, material and method for manufacturing the same
    • 稀土粘结磁体,材料及其制造方法
    • US5393445A
    • 1995-02-28
    • US176645
    • 1994-01-03
    • Takashi FuruyaNaoki Hayashi
    • Takashi FuruyaNaoki Hayashi
    • H01F1/053H01F1/057H01F1/059
    • H01F1/0578H01F1/0533H01F1/0572H01F1/059Y10S428/90Y10T428/2982Y10T428/2991Y10T428/2998
    • A material for a rare-earth bonded magnet is prepared by coating a rare-earth magnetic powder with a heat resisting addition polymerizable thermosetting resin consisting essentially of a monomer or polymer of 2,2-bis(cyanatophenyl) propane in an amount of not more than 2 wt % based on the weight of the magnetic powder. The oxidation of the rare-earth magnetic powder is thereby prevented or retarded by triazine rings formed in the coating film of the heat resisting addition polymerizable thermosetting resin. A rare-earth bonded magnet having improved heat resistance is prepared by agglomerating the coated rare-earth magnetic powder with a binder. The heat resistance of the bonded magnet is further improved by curing the heat resisting addition polymerizable thermosetting resin in a vacuum and by adding an organometallic salt as a metallic catalyst, to thereby improve the integrity of the coating film.
    • 通过用基本上由2,2-双(氰基苯基)丙烷的单体或聚合物组成的耐热性可加聚热固性树脂涂覆稀土磁性粉末,制备稀土粘结磁体的材料,其量不超过 超过2重量%,基于磁粉的重量。 由此,可以通过在耐热性可加聚热固性树脂的涂膜中形成的三嗪环来防止或延缓稀土类磁粉的氧化。 通过将涂覆的稀土磁性粉末与粘合剂团聚来制备具有改善的耐热性的稀土粘结磁体。 通过在真空中固化耐热性可加聚热固性树脂并通过添加作为金属催化剂的有机金属盐,进一步提高粘结磁体的耐热性,从而提高涂膜的完整性。