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    • 6. 发明授权
    • Method of recovering and recycling magnetic powder from rare earth bond magnet
    • 从稀土键磁铁回收和再循环磁粉的方法
    • US06533837B1
    • 2003-03-18
    • US09677589
    • 2000-10-03
    • Yoshikazu YamagataFumitoshi Yamashita
    • Yoshikazu YamagataFumitoshi Yamashita
    • B22F902
    • C22B7/006B29B17/02B29B2017/0293B29K2503/06C22B59/00H01F1/0558H01F1/0578Y02P10/234Y02W30/622
    • A method of recovering magnetic powder from rare earth bond magnet comprising a process of soaking the rare earth bond magnet in a decomposing solution, or holding it in a gas phase of the decomposing solution, containing at least one solvent selected from a group comprising tetralin, naphthalene, 1,4-hydroxynaphthalene, naphthol, biphenyl, 2-hexanone, acetonylacetone, phorone cyclohexanone and methlcyclohexanone, and heating at a temperature not lower than 230° C. A method of recycling recovered magnetic powder by substituting at least a part or all of magnetic powder in the molding compound of a second rare earth bond magnet. For preventing deterioration of magnetic powder from oxidation at surface, air in the decomposition vessel is substituted with nitrogen gas, helium gas and argon gas or is reduced to a pressure not higher than 10−2 Torr.
    • 一种从稀土粘结磁体中回收磁粉的方法,包括将稀土键磁体浸入分解溶液中或将其保持在分解溶液的气相中的方法,该方法含有至少一种选自四氢化萘, 萘,1,4-羟基萘,萘酚,联苯,2-己酮,丙酮酰丙酮,甲氧基环己酮和甲基环己酮,并在不低于230℃的温度下加热。回收回收的磁性粉末的方法至少部分或全部代替 的第二稀土键磁体的模塑料中的磁粉。 为了防止磁性粉末在表面氧化的恶化,分解容器中的空气被氮气,氦气和氩气置换,或者被还原成不高于10-2乇的压力。
    • 7. 发明授权
    • Rare earth resin magnet, magnet rotor, magnet motor using the same, and its manufacturing method
    • 稀土树脂磁体,磁铁转子,使用其的磁铁电动机及其制造方法
    • US06387294B1
    • 2002-05-14
    • US09680927
    • 2000-10-10
    • Fumitoshi YamashitaYoshikazu YamagataHiromichi Fujimoto
    • Fumitoshi YamashitaYoshikazu YamagataHiromichi Fujimoto
    • H01R700
    • H01F1/0578H01F41/0266H02K1/02H02K15/03
    • A magnet having a maximum energy product at 20° C. of 18 MGOe or more, and an extremely excellent magnetic performance is obtained. A magnet stable in the magnetic performance in practical temperature range is obtained. A magnet having an excellent recycling performance is obtained. A magnet motor using such rare earth resin magnet generates a potent static magnetic field in the space with the armature core. The motor output is enhanced, and the current consumption is lowered. The rare earth resin magnet comprises at least one resin of thermoplastic resin and thermoplastic elastomer, pentaerythritol stearic acid triester, and rare earth magnetic powder. The rare earth magnetic powder, resin, and pentaerythritol stearic acid triester form a mutually mixed resin magnet composition, and this resin magnet composition has a predetermined shape. A magnet rotor has this rare earth resin magnet. A magnet motor has this rare earth resin magnet, a rotor frame, an armature core, a winding, and a rotor, and the rare earth resin magnet has a ring shape, and this rare earth resin magnet of the ring shape is disposed in the inner periphery of the rotor frame.
    • 在20℃下具有18MGOe以上的最大能量积的磁体和非常优异的磁性能。 获得在实用温度范围内磁性能稳定的磁体。 获得具有优异回收性能的磁铁。 使用这种稀土树脂磁体的磁体电动机在与电枢磁芯的空间中产生有效的静磁场。 电机输出增强,电流消耗降低。 稀土树脂磁体包括至少一种热塑性树脂和热塑性弹性体树脂,季戊四醇硬脂酸三酯和稀土磁性粉末。 稀土磁性粉末,树脂和季戊四醇硬脂酸三酯形成相互混合的树脂磁体组合物,该树脂磁体组合物具有预定的形状。 磁体转子具有这种稀土树脂磁体。 磁铁电动机具有这种稀土类树脂磁体,转子架,电枢铁心,绕组和转子,稀土类树脂磁体具有环状,该环状的稀土类树脂磁铁配置在 转子架的内周。