| 摘要 |
In the method for manufacturing ferrite type permanent magnets according to the formula M1-xRxFe12-yTyO19:a) a mixture of the raw materials PM, PF, PR and PT of elements M, Fe, R and T, respectively, is formed, Fe and M being the main raw materials and R and T being substitute raw materials;b) the mixture is roasted to form a clinker;c) wet grinding of said clinker is carried out;d) the particles are concentrated and compressed in an orientation magnetic field to form an anisotropic, easy to handle green compact of a predetermined shape; ande) the anisotropic green compact D is sintered to obtain a sintered element. The surface are GS and percentage of at least one of the substitute raw materials is selected according to the surface area and percentage of the iron raw material to obtain magnets with high squareness and overall performance index properties. |
