| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rare-earth permanent magnet high in residual magnetic flux density and saturation magnetization and practical in coercive force in the rare-earth permanent magnet containing La as a main rare-earth element. <P>SOLUTION: The rare-earth permanent magnet has a composition (La<SB>1-x</SB>Re<SB>x</SB>)<SB>y</SB>(B<SB>1-q</SB>C<SB>q</SB>)<SB>z</SB>(Fe<SB>1-r</SB>T<SB>r</SB>)<SB>100-y-z</SB>. Here, Re=R'<SB>a</SB>R"<SB>1-a'</SB>in which R' is Nd, Pr or a combination of them, R" is an rare-earth element other than La, Nd, Pr and Ce, T is a transition metal element other than Fe, 0.3≤x≤0.7, 12≤y≤20, 4≤z≤10, 0.5≤a≤1.0, 0≤q≤0.1, and 0≤r≤0.1. <P>COPYRIGHT: (C)2011,JPO&INPIT |
