| 摘要 |
<p>[Problem] To provide a ferrite magnetic material which has a high coercive force (HcJ) of 477 kA/m or higher, maintains a residual magnetic flux density (Br) of 330 mT or more, and can exhibit high magnetic properties. To also provide a ferrite sintered magnet and a motor. [Solution] The present invention contains a ferrite having a hexagonal structure as the main component, at least an Si component as a sub component, and an Al component and/or a Cr component, wherein: the structural ratio of the metal elements is represented by compositional formula RxA1-x(Fe12-yCoy)z; and L which represents the Al content, and G which represents a value obtained by calculating the equation [(R+A)-(Fe+Co)/12]/Si by using values obtained from the atom% of R, A, Fe, Co, and Si are within a predetermined range. In the compositional formula, R represents at least one element selected from among La, Ce, Pr, Nd, and Sm, and contains at least La; and A represents at least one element selected from among Ca, Sr and Ba, and contains at least Sr.</p> |
