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    • 65. 发明申请
    • IRON-BASED SOFT MAGNETIC POWDER AND PRODUCTION METHOD THEREOF
    • 基于铁的软磁粉及其生产方法
    • US20130181804A1
    • 2013-07-18
    • US13709598
    • 2012-12-10
    • Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    • Takeo MIYAMURAHiroyuki MitaniHirofumi Hojo
    • H01F1/01H01F3/08H01F41/02
    • H01F1/01H01F1/344H01F3/08H01F41/02H01F41/0246Y10T428/12181
    • Disclosed is an iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization, and thermally reducing the iron-oxide-based soft magnetic powder. The iron-based soft magnetic powder has an average particle size of 100 μm or more and has an interface density of more than 0 μm−1 and less than or equal to 2.6×10−2 μm−1, where the interface density is determined from a cross-sectional area (μm2) and a cross-sectional circumference (μm) of the iron-based soft magnetic powder. The iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization and thermally reducing the iron-oxide-based soft magnetic powder, when used for the production of a dust core, can give a dust core having a low coercive force. Also disclosed is a duct core having a low coercive force and exhibiting superior magnetic properties.
    • 公开了通过水雾化制备基于氧化铁的软磁性粉末,并且还原铁氧化物系软磁性粉末而得到的铁系软磁性粉末。 铁基软磁性粉末的平均粒径为100μm以上,并且界面密度大于0mum-1且小于或等于2.6×10-2mum-1,其中确定界面密度 从铁基软磁性粉末的横截面积(mum2)和横截面周长(mum)。 通过水雾化制备氧化铁系软磁性粉末而得到的铁系软磁性粉末,当用于制备粉尘芯时,可以将铁氧化物系软磁粉末热还原,得到粉芯 具有低的矫顽力。 还公开了具有低矫顽力并表现出优异的磁性能的管芯。
    • 70. 发明授权
    • Method of manufacturing laminated polar anisotropic hybrid magnet
    • 层压极性各向异性混合磁体的制造方法
    • US07328500B2
    • 2008-02-12
    • US10834302
    • 2004-04-28
    • Sang-Myun KimDong-Hwan Kim
    • Sang-Myun KimDong-Hwan Kim
    • H01F3/08
    • H01F41/028Y10T29/49076Y10T29/49078
    • Disclosed is a method of manufacturing a laminated polar anisotropic hybrid magnet, which includes separately mixing first permanent magnet powders having low magnetic properties and second permanent magnet powders having high magnetic properties with a thermoplastic resin to prepare first and second compound pellets, respectively, and firstly injecting the first compound pellets by use of a first injection mold, to prepare a polar anisotropic and anisotropic resin magnet, which is then placed into a second injection mold having an outer diameter lager than that of the first mold, followed by secondly injecting in a magnetic field together with the second compound pellets. The manufacturing method of the current invention is advantageous in terms of exhibition of higher magnetic properties of the laminated polar anisotropic hybrid magnet, and reduction of the use of expensive materials, thus generating economic benefits. Further, a flux density wave of the magnet can be easily controlled on the magnet surface to be suitable for performances and characteristics of the motors, and temperature properties of the magnet can be enhanced. Thereby, the entire manufacturing method can be efficiently carried out, therefore increasing productivity and reliability in practical use thereof.
    • 本发明公开了一种层叠极性各向异性混合磁体的制造方法,其特征在于,分别将具有低磁特性的第一永久磁铁粉末和具有高磁性的第二永久磁铁粉末与热塑性树脂分开混合,分别制备第一和第二复合粒料, 通过使用第一注射模具注入第一复合粒料,制备极性各向异性和各向异性树脂磁体,然后将其放入具有比第一模具的外径更大的外径的第二注射模具中,然后第二次注入 磁场与第二复合粒料一起。 本发明的制造方法在层叠极性各向异性混合磁体的较高磁性的展示方面是有利的,并且减少了昂贵材料的使用,从而产生经济效益。 此外,可以容易地将磁体的磁通密度波控制在磁体表面上以适合电动机的性能和特性,并且可以提高磁体的温度特性。 由此,可以有效地进行整个制造方法,从而提高其实际应用中的生产率和可靠性。