| 简介 |
[Challenge]Providing ferrite sintered magnets with magnet characteristics that satisfy all of high Br, high HcJ, and high Hk/HcJ, as well as reduced co usage compared to conventional CaLaCo magnets. Solution : In the general formulas indicating the atomic ratio of the metal elements of Ca, R, Sr, Fe and Co (however, R is at least a type of rare earth element and contains La essentially) : Ca1-x-yRxAyFe2n-zCoz, x, y and z, and n (however, 2n are molar ratios and are represented by 2n = (Fe + Co) / (Ca + R + Sr)) 0. 4≦x＜0． 5、0＜y≦0． 2、0． 18＜z＜0． 3、1． 6≦x／z≦2． 25 and 8. Ferrite temporary grilled body that satisfies 5≦2n-z ≦10. [Selection figure]None |
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