Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High intrinsic coercive force permanent magnet strontium ferrite and preparation method thereof
The invention discloses permanent magnetic strontium ferrite with high intrinsic coercive force and a preparation method thereof. The permanent magnet strontium ferrite with high intrinsic coercive force comprises the following components in percentage by weight: 80-85 wt% of an iron source; 1-3 wt% of strontium carbonate; 8-15 wt% of lanthanum oxide; 2-5 wt% of cobalt oxide; the iron source contains 0.2 to 0.3 wt% of Si element in terms of SiO2 and 0.2 to 0.4 wt% of Al element in terms of Al2O3. According to the method, the Si element contained in the iron ore concentrate reacts with Fe2O3 to form FeSiO3 with a low melting point, FeSiO3 generated in the sintering process exists in a grain boundary, and the effect of inhibiting grain growth is achieved, so that the strontium ferrite grains in the pre-sintered material prepared from the iron ore concentrate are finer, and the intrinsic coercive force is higher.
本发明公开了一种高内禀矫顽力永磁锶铁氧体及其制备方法。该高内禀矫顽力永磁锶铁氧体，包括以下重量百分比的组分：铁源80～85wt％；碳酸锶1～3wt％；氧化镧8～15wt％；氧化钴2～5wt％；所述铁源中含有换算成SiO2时为0.2～0.3wt％的Si元素，以及换算为Al2O3时为0.2～0.4wt％的Al元素。本发明采用铁精矿中含有的Si元素与Fe2O3反应形成了低熔点的FeSiO3，烧结过程中产生的会存在于晶界之内，起到抑制晶粒长大的作用，因此铁精矿制备的预烧料中锶铁氧体的晶粒更加细小，内禀矫顽力更高。
High intrinsic coercive force permanent magnet strontium ferrite and preparation method thereof
The invention discloses permanent magnetic strontium ferrite with high intrinsic coercive force and a preparation method thereof. The permanent magnet strontium ferrite with high intrinsic coercive force comprises the following components in percentage by weight: 80-85 wt% of an iron source; 1-3 wt% of strontium carbonate; 8-15 wt% of lanthanum oxide; 2-5 wt% of cobalt oxide; the iron source contains 0.2 to 0.3 wt% of Si element in terms of SiO2 and 0.2 to 0.4 wt% of Al element in terms of Al2O3. According to the method, the Si element contained in the iron ore concentrate reacts with Fe2O3 to form FeSiO3 with a low melting point, FeSiO3 generated in the sintering process exists in a grain boundary, and the effect of inhibiting grain growth is achieved, so that the strontium ferrite grains in the pre-sintered material prepared from the iron ore concentrate are finer, and the intrinsic coercive force is higher.
本发明公开了一种高内禀矫顽力永磁锶铁氧体及其制备方法。该高内禀矫顽力永磁锶铁氧体，包括以下重量百分比的组分：铁源80～85wt％；碳酸锶1～3wt％；氧化镧8～15wt％；氧化钴2～5wt％；所述铁源中含有换算成SiO2时为0.2～0.3wt％的Si元素，以及换算为Al2O3时为0.2～0.4wt％的Al元素。本发明采用铁精矿中含有的Si元素与Fe2O3反应形成了低熔点的FeSiO3，烧结过程中产生的会存在于晶界之内，起到抑制晶粒长大的作用，因此铁精矿制备的预烧料中锶铁氧体的晶粒更加细小，内禀矫顽力更高。
High intrinsic coercive force permanent magnet strontium ferrite and preparation method thereof
一种高内禀矫顽力永磁锶铁氧体及其制备方法
LI XIN (Autor:in) / PEI XIAODONG (Autor:in) / LUO YANHUA (Autor:in) / WANG FAN (Autor:in) / BAO SIKAI (Autor:in) / BAO WEIDONG (Autor:in) / ZHANG JINYAN (Autor:in) / ZHANG QIANQIAN (Autor:in)
01.03.2022
Patent
Elektronische Ressource
Chinesisch
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