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-xLaxF