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Permanent magnetic strontium ferrite magnetic powder as well as preparation method and application thereof
The invention provides permanent magnetic strontium ferrite magnetic powder as well as a preparation method and application thereof, the chemical formula of the permanent magnetic strontium ferrite magnetic powder is Sr1-xLaxFe12-yAlyO19, x is greater than 0 and less than or equal to 0.3, and y is greater than 0 and less than or equal to 0.4. La and Al with specific contents are introduced for co-doping, and under the synergistic effect of the La and Al, the intrinsic magnetic performance of the magnetic powder can be improved, so that the residual magnetism of the magnetic powder is reduced, the coercive force of the magnetic powder is improved, and a good foundation can be brought to a subsequent forming process. And meanwhile, the cost can be controlled by co-doping La and Al, so that the cost is relatively low. The permanent magnet prepared on the basis of the method has high Hcj and squareness, and full utilization of product performance is facilitated.
本发明提供了一种永磁锶铁氧体磁粉及其制备方法和应用，所述永磁锶铁氧体磁粉的化学式为：Sr1‑xLaxFe12‑yAlyO19，其中，0＜x≤0.3，0＜y≤0.4。本发明通过引入特定含量的La和Al进行共掺杂，在二者的协同作用下，能够提升磁粉的内禀磁性能，使得磁粉的剩磁降低，矫顽力提高，可为后续成型工艺带来良好的基础。同时，采用La和Al进行共掺杂能够控制成本，使成本较低。基于此制备的永磁磁体具有较高的Hcj和方形度，有利于产品性能的充分利用。
Permanent magnetic strontium ferrite magnetic powder as well as preparation method and application thereof
The invention provides permanent magnetic strontium ferrite magnetic powder as well as a preparation method and application thereof, the chemical formula of the permanent magnetic strontium ferrite magnetic powder is Sr1-xLaxFe12-yAlyO19, x is greater than 0 and less than or equal to 0.3, and y is greater than 0 and less than or equal to 0.4. La and Al with specific contents are introduced for co-doping, and under the synergistic effect of the La and Al, the intrinsic magnetic performance of the magnetic powder can be improved, so that the residual magnetism of the magnetic powder is reduced, the coercive force of the magnetic powder is improved, and a good foundation can be brought to a subsequent forming process. And meanwhile, the cost can be controlled by co-doping La and Al, so that the cost is relatively low. The permanent magnet prepared on the basis of the method has high Hcj and squareness, and full utilization of product performance is facilitated.
本发明提供了一种永磁锶铁氧体磁粉及其制备方法和应用，所述永磁锶铁氧体磁粉的化学式为：Sr1‑xLaxFe12‑yAlyO19，其中，0＜x≤0.3，0＜y≤0.4。本发明通过引入特定含量的La和Al进行共掺杂，在二者的协同作用下，能够提升磁粉的内禀磁性能，使得磁粉的剩磁降低，矫顽力提高，可为后续成型工艺带来良好的基础。同时，采用La和Al进行共掺杂能够控制成本，使成本较低。基于此制备的永磁磁体具有较高的Hcj和方形度，有利于产品性能的充分利用。
Permanent magnetic strontium ferrite magnetic powder as well as preparation method and application thereof
一种永磁锶铁氧体磁粉及其制备方法和应用
SUN YANG (author) / GONG HUAYANG (author) / JING XIAODONG (author) / LI ZUOGUANG (author) / QIN CIYU (author)
2023-11-24
Patent
Electronic Resource
Chinese
Permanent magnetic strontium ferrite as well as preparation method and application thereof
| European Patent Office | 2024
| European Patent Office | 2023
| European Patent Office | 2024
Permanent magnetic ferrite magnetic powder and preparation method thereof
| European Patent Office | 2023