| 摘要 |
An object of the invention is to provide a ferrite magnetic material, which can provide permanent magnet wherein a high Br and HcJ are maintained, and in addition, a high Hk/HcJ is provided, and to provide a ferrite magnet and ferrite sintered magnet respectively comprising said ferrite magnetic material. In order to achieve such object, a ferrite magnetic material, in which its main phase comprises ferrite phase having a hexagonal crystal structure, and metal element composition expressed by Ca 1-w-x-y R w Sr x Ba y Fe z M m wherein 0.25 < w < 0.5, 0.01 < x < 0.35, 0.0001 < y < 0.013 , y < x, 8.7 < z < 9.9, 1.0 < w/m < 2.1, 0.017 < m / z < 0.055 and Si component is at least included as a sub-component, and wherein; when content yl mass% of the Si component in the ferrite magnetic material, with respect to SiO 2 , is shown on Y-axis and a total content xl of z and m is shown on X-axis, a relation between xl and yl is within a range surrounded by 4 points placed on X-Y coordinate having the X and Y axes, and a ferrite magnet and a ferrite sintered magnet comprising the ferrite magnetic material are provided. |
