COMPOSITE, SOFT-MAGNETIC POWDER AND ITS PRODUCTION METHOD, AND DUST CORE FORMED THEREBY
    2.
    发明申请
    COMPOSITE, SOFT-MAGNETIC POWDER AND ITS PRODUCTION METHOD, AND DUST CORE FORMED THEREBY 审中-公开
    复合,软磁粉及其生产方法,并形成核心

    公开(公告)号:US20130277601A1

    公开(公告)日:2013-10-24

    申请号:US13978027

    申请日:2012-03-06

    IPC分类号: H01F1/01 H01F41/00

    摘要: A composite, soft-magnetic powder comprising soft-magnetic, iron-based core particles having an average particle size of 2-100 μm, and boron nitride-based coating layers each covering at least part of each soft-magnetic, iron-based core particle, said coating layers being polycrystalline layers comprising fine boron nitride crystal grains having different crystal orientations and an average crystal grain size of 3-15 nm, the average thickness of said polycrystalline layers being 6.6% or less of the average particle size of said soft-magnetic, iron-based core particles, is produced by (1) mixing iron nitride powder having an average particle size of 2-100 μm with boron powder having an average particle size of 0.1-10 μm, (2) heat-treating the resultant mixed powder at a temperature of 600-850° C. in a nitrogen atmosphere, and (3) removing non-magnetic components.

    摘要翻译: 一种复合软磁粉末,其包含平均粒度为2〜100μm的软磁性铁系核心粒子,以及氮化硼系涂覆层,其各自覆盖至少部分软磁性铁基磁心 所述涂层是包含具有不同晶体取向的平均晶粒尺寸为3-15nm的精细氮化硼晶粒的多晶层,所述多晶层的平均厚度为所述软化物的平均粒径的6.6%以下 通过(1)将平均粒径为2〜100μm的氮化铁粉末与平均粒径为0.1〜10μm的硼粉末混合,制成铁磁性核心颗粒,(2)热处理 得到的混合粉末在氮气气氛中在600-850℃的温度下,和(3)去除非磁性组分。