| 摘要 |
PURPOSE:To obtain excellent resources, price and magnetic characteristic while being provided with high coercive force, and a high energy product by containing the other small quantity element X (one kind or more of Cu, P, C, S) while limiting the content thereof less than the prescribed value in a Fe-B-R ternary permanent magnet. CONSTITUTION:A permanent magnet is formed of a magnetic anisotropic sintered body consisting of one, two or more kinds of element X (provided that an X content is under 4.0% in case of above two kinds of the element X) under the respective prescribed % (excluding 0%) of at least one of Nd, Pr, Dy, Ho, Tb as a rare earth element (R), 8 to 30%, B, 2 to 28%, Cu 3.5%, S, 2.5%, C, 4%, P, 3.5% and the rest substantially Fe in atomic percent. Further, the sum of at least one kind of Nd, Pr, Dy, Ho and Tb as the rare earth element (R) and at least one kind of La, Ce, Pm, Sm, Eu, Gd, Er, Tm, Yb, Lu and Y shall be 8 to 30% (provided that above 50% of the above-mentioned rare earth element (R) is one or two of Nd and Pr), B shall be 2 to 28%, the rest shall be the same composition as the above-mentioned. |
