CN108010603A - 一种铁基软磁合金粉的绝缘包覆剂 - Google Patents

一种铁基软磁合金粉的绝缘包覆剂 Download PDF

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CN108010603A
CN108010603A CN201711335274.6A CN201711335274A CN108010603A CN 108010603 A CN108010603 A CN 108010603A CN 201711335274 A CN201711335274 A CN 201711335274A CN 108010603 A CN108010603 A CN 108010603A
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phosphate
iron
insulating wrapped
soft magnetic
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CN108010603B (zh
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郑翠红
赵利明
杨磊
方道来
雷堃
邱佳威
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Anhui University of Technology AHUT
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/008—Other insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/025—Other inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
    • H01F1/26—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
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Abstract

本发明公开一种铁基软磁金属磁粉的绝缘包覆剂，属于磁性材料制备技术领域。该绝缘包覆剂由磷酸、聚合磷酸盐、磷酸二氢盐以及外加剂组成；其质量组成如下：磷酸占10‑50wt％；磷酸二氢盐占30‑60wt％；聚合磷酸盐占10‑30wt％；外加剂占1‑5wt％；所述外加剂为钼酸钠、硫脲、六次甲基四胺中的一种；所述的磷酸二氢盐为磷酸二氢锰、磷酸二氢锌、磷酸二氢铝中的一种或两种；所述的聚合磷酸盐为三聚磷酸钠或焦磷酸钠。采用本发明提供的绝缘包覆剂对铁基软磁金属磁粉进行包覆，包覆层均匀、紧密、绝缘，能得到磁学性能优良的磁粉芯。

Description

一种铁基软磁合金粉的绝缘包覆剂
技术领域
本发明属于磁性材料制备技术领域，具体涉及一种铁基软磁合金粉的绝缘包覆剂。
背景技术
金属软磁粉芯是将软磁合金粉与绝缘剂、粘合剂混合均匀后压制成型，并经过热处理而获得的一种复合软磁材料。金属软磁磁粉芯因具有较高的磁通密度、高的磁导率而受到广泛应用。金属粉绝缘包覆层对磁粉芯的作用是起绝缘和调节有效磁导率的作用，要求包覆层具有绝缘、致密、耐压等性能。
目前铁基金属磁粉剂多数采用磷酸作包覆剂，在铁基金属磁粉表面形成一层磷化膜，但生成的膜层疏松、不致密。主要是磷酸在铁基金属磁粉表面反应迅速，难以形成致密膜，从而影响磁粉芯的磁学性能。
发明内容
为克服现有技术的不足，本发明的目的是提供一种适用于铁基金属磁粉绝缘包覆剂，以期通过该包覆剂得到的包覆层具有绝缘、致密、耐压等特性。
为了实现上述目的，本发明是通过以下技术方案予以实现的。
本发明提供了一种铁基软磁金属磁粉的绝缘包覆剂，其由磷酸、磷酸二氢盐、聚合磷酸盐以及外加剂组成。其质量组成如下：磷酸占10-50wt％；磷酸二氢盐占30-60wt％；聚合磷酸盐占10-30wt％；外加剂占1-5wt％。所述外加剂为钼酸钠、硫脲、六次甲基四胺中的一种。
进一步的，所述的磷酸二氢盐为磷酸二氢锰、磷酸二氢锌、磷酸二氢铝中的一种或两种。
进一步的，所述的聚合磷酸盐为三聚磷酸钠或焦磷酸钠。
本发明科学原理：
本发明采用铁基金属磁粉绝缘剂，与金属磁粉表面发生化学反应，通过加入外加剂与聚合磷酸盐，一方面控制反应速度，另一方面反应产物在磁粉表面形成聚合物，从而形成一层致密的耐压膜层。通过调整膜层厚度可以调整磁粉芯的有效磁导率。
与现有技术相比，本发明具有以下技术效果：
1、本发明采用铁基金属磁粉绝缘包覆剂，在金属表面形成一层致密的包覆层，能显著提高磁粉芯的叠加性能，降低其磁损耗。
2、本发明适用于铁基磁粉芯，可以大幅度提高叠加性能以及降低磁损耗。
附图说明
图1为本发明实施例1包覆后的铁硅铝粉体电镜图。
图2为本发明实施例2包覆后的铁硅铝粉体电镜图。
图3为本发明实施例3包覆后的铁硅粉体电镜图。
具体实施方式
以下结合具体实施例详述本发明，但本发明不局限于下述实施例。
实施例1
铁硅铝金属磁粉绝缘包覆剂按质量组成比称量：
磷酸50wt％；磷酸二氢锰10wt％,；磷酸二氢锌20wt％；三聚磷酸钠18wt％；硫脲2wt％。加入水溶解并混合均匀。按金属磁粉质量比2.0％加入铁硅铝粉中，加热搅拌至干燥。得到包覆层致密、绝缘的铁硅铝金属磁粉。如图1所示。
实施例2
铁硅铝金属磁粉绝缘包覆剂按质量组成比称量：
磷酸40wt％；磷酸二氢铝25wt％,；磷酸二氢锌24wt％；焦磷酸钠10wt％；钼酸钠0.5wt％；硫脲0.5wt％。加入水溶解并混合均匀。包覆剂按金属磁粉总质量1.8wt％加入铁硅铝粉中，加热搅拌至干燥。得到包覆层致密、绝缘的铁硅铝金属磁粉。如图2所示。
实施例3
铁硅金属磁粉绝缘包覆剂按质量组成比称量：
磷酸10wt％；磷酸二氢铝25wt％,；磷酸二氢锌30wt％；三聚磷酸钠30wt％；钼酸钠1wt％，六次甲基四胺4％。加入水溶解并混合均匀。包覆剂按金属磁粉质量比1.0％加入铁硅粉中，加热搅拌至干燥。得到包覆层致密、绝缘的铁硅金属磁粉。如图3所示。

Claims (3)

1.一种铁基软磁金属磁粉的绝缘包覆剂，其特征在于，所述绝缘包覆剂由磷酸、磷酸二氢盐、聚合磷酸盐以及外加剂组成；其质量组成如下：
所述外加剂为钼酸钠、硫脲、以及六次甲基四胺中的一种。
2.如权利要求1所述的铁基软磁金属磁粉的绝缘包覆剂，其特征在于，所述磷酸二氢盐为磷酸二氢锰、磷酸二氢锌、磷酸二氢铝中的一种或两种。
3.如权利要求1所述的铁基软磁金属磁粉的绝缘包覆剂，其特征在于，所述聚合磷酸盐为三聚磷酸钠或焦磷酸钠。
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CN110202129A (zh) * 2019-07-02 2019-09-06 深圳市麦捷微电子科技股份有限公司 一种金属软磁粉耐高温防锈型钝化法
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CN110202129A (zh) * 2019-07-02 2019-09-06 深圳市麦捷微电子科技股份有限公司 一种金属软磁粉耐高温防锈型钝化法
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CN115579233A (zh) * 2022-10-21 2023-01-06 广东省科学院新材料研究所 一种采用电化学磷化法制备金属磁粉芯的方法

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