| 摘要 |
A ferrite magnet which contains A, R, Fe, M and Si as metal elements and has hexagonal ferrite as the main phase thereof; wherein A represents at least one element selected from among Sr, Ba, Ca and Pb, R represents at least one element selected from among rare earth elements (containing Y) and Bi, and M represents at least one element selected from among Co, Mn, Al, Cr, Ni and Zn; wherein when the metal elements are converted to metal oxides having stoichiometric compositions and contents of respective oxides are calculated, the magnet has a SiO2 content of 1.3 to 2.0 mole %; and wherein the magnet has an atomic ratio of {A + R (Fe + M)/12}/Si of 1.1 to 1.9. The ferrite magnet can be used for suppressing the fluctuation of magnetic properties cased by the fluctuation of firing conditions in the preparation of a ferrite magnet having high residual magnetic flux density and high coercive force.
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