Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Permanent magnetic ferrite and preparation method and application thereof
The invention provides a permanent magnetic ferrite and a preparation method and application thereof, the molecular formula of the permanent magnetic ferrite is SrFe12-xMnxO19, 0 < x < = 0.26; the preparation method comprises the steps of burdening, primary ball milling, drying, pre-sintering, coarse crushing, secondary ball milling, wet pressing molding and sintering. When the manganese content is increased to a certain value, the residual magnetism tends to be reduced, and the coercive force is monotonically increased; if the addition amount is continuously increased, the residual magnetism is sharply reduced, and although the coercive force is continuously increased, the overall performance is greatly influenced. Through comparison, the low-quality iron oxide red containing a certain amount of manganese can be completely used for producing high-coercivity ferrite; the low-quality iron oxide red is used, and the grain size is narrowed during secondary ball milling, so that the grain size distribution is effectively narrowed while grains smaller than 1 micron are obtained; in addition, by adding the dispersing agent, powder agglomeration and magnetic interaction among crystal grains are reduced, so that the coercivity of the permanent magnetic ferrite is improved.
本发明提供了一种永磁铁氧体及其制备方法和应用，该永磁铁氧体的分子式为SrFe12‑xMnxO19，其中，0＜x≤0.26；制备方法包括配料、一次球磨、烘干、预烧、粗粉碎、二次球磨、湿压成型和烧结；本发明的锰含量增加到一定值时，剩磁有降低的趋势，矫顽力单调增大；若继续增大加入量，剩磁急剧下降，矫顽力虽然还是继续增大，但整体性能受到较大影响。通过对比，含一定量锰的低品质铁红，完全可以用来生产高矫顽力铁氧体；本发明使用低品质铁红、二次球磨时将粒径收窄等工艺，获得小于1μm的晶粒的同时，有效收窄晶粒尺寸分布；另外，通过加入分散剂减少粉料团聚和晶粒之间磁相互作用，从而提高永磁铁氧体的矫顽力。
Permanent magnetic ferrite and preparation method and application thereof
The invention provides a permanent magnetic ferrite and a preparation method and application thereof, the molecular formula of the permanent magnetic ferrite is SrFe12-xMnxO19, 0 < x < = 0.26; the preparation method comprises the steps of burdening, primary ball milling, drying, pre-sintering, coarse crushing, secondary ball milling, wet pressing molding and sintering. When the manganese content is increased to a certain value, the residual magnetism tends to be reduced, and the coercive force is monotonically increased; if the addition amount is continuously increased, the residual magnetism is sharply reduced, and although the coercive force is continuously increased, the overall performance is greatly influenced. Through comparison, the low-quality iron oxide red containing a certain amount of manganese can be completely used for producing high-coercivity ferrite; the low-quality iron oxide red is used, and the grain size is narrowed during secondary ball milling, so that the grain size distribution is effectively narrowed while grains smaller than 1 micron are obtained; in addition, by adding the dispersing agent, powder agglomeration and magnetic interaction among crystal grains are reduced, so that the coercivity of the permanent magnetic ferrite is improved.
本发明提供了一种永磁铁氧体及其制备方法和应用，该永磁铁氧体的分子式为SrFe12‑xMnxO19，其中，0＜x≤0.26；制备方法包括配料、一次球磨、烘干、预烧、粗粉碎、二次球磨、湿压成型和烧结；本发明的锰含量增加到一定值时，剩磁有降低的趋势，矫顽力单调增大；若继续增大加入量，剩磁急剧下降，矫顽力虽然还是继续增大，但整体性能受到较大影响。通过对比，含一定量锰的低品质铁红，完全可以用来生产高矫顽力铁氧体；本发明使用低品质铁红、二次球磨时将粒径收窄等工艺，获得小于1μm的晶粒的同时，有效收窄晶粒尺寸分布；另外，通过加入分散剂减少粉料团聚和晶粒之间磁相互作用，从而提高永磁铁氧体的矫顽力。
Permanent magnetic ferrite and preparation method and application thereof
永磁铁氧体及其制备方法和应用
ZHANG HAILANG (Autor:in) / ZHANG ZHENGWEI (Autor:in) / BAO YONGMING (Autor:in) / LIU GUOPING (Autor:in) / GU XIEFENG (Autor:in) / XU JIE (Autor:in) / PENG CHUNLAN (Autor:in) / ZHOU XIAOQIANG (Autor:in) / HUANG ZIQIAN (Autor:in) / LI BIN (Autor:in)
18.10.2022
Patent
Elektronische Ressource
Chinesisch
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