FERRITE COMPOSITION AND MOTOR HAVING THE SAME

摘要

The present invention provides a sintered ferrite magnet having excellent residual magnetic flux density (Br) and rectangularity ratio (Hk/HcJ), and a motor having the same. According to the present invention, the sintered ferrite magnet comprises: a main phase of M type Sr ferrite having a hexagonal crystal structure; 0.05-1.35 mass% of Zn in ZnO; and M1/M2 equal to or less than 0.43 when an amount of a rare-earth element (R) is M1 in terms of mole and the amount of Zn is M2 in terms of mole.