Investigation on the La Replacement and Little Additive Modification of High-Performance Permanent Magnetic Strontium-Ferrite

In this work, an experiment was carried out to investigate the preparation condition of anisotropic, Fe-deficient, M-type Sr ferrite with optimum magnetic and physical properties by changing experimental parameters, such as La substitution amount little additive modification during fine milling process. The compositions calcined ferrites were chosen according stoichiometry LaxSr1-xFe12-2xO19, where single-phase powder synthesized a composition x = 0.30. effect CaCO3, SiO2, Co3O4 inter-additives on also discussed in order obtain low-temperature sintered magnets. Br 4608 Gauss, bHc 3650 Oe, iHc 3765 (BH)max 5.23 MGOe obtained for hard magnets low cobalt content at 1.7 wt%, which will eventually be used high-end permanent high-efficiency motor application automobiles > 4600 ± 50 G 3600 Oe.