| 摘要 |
<p>Nd containing R-Fe-B sintered magnet which has 0.5 %/ DEG C or more of temperature-coefficient of coercive force (iHc) and a composition that R=11-18 at% (R is one or more rare-earth elements except for Dy, with the proviso of 80 at%</=(Nd+Pr)/R</=100 at%), B=6-12 at%, and balance of Fe and Co (with the proviso of Co is 25 at% or less relative to the total of Co and Fe (including 0 % of Co)) and impurities, is improved to have 15 kOe or more of coercive force (iHc) by means of further containing 2 - 6 at% of V and modifying the minority phase such that B in excess of a stoichiometric composition of R2Fe14B compound-phase essentially does not form RFe4B4-compound minority phase but forms a finely dispersed V-T-B compound minority phase (T is Fe, and in a case of containing Co, T is Fe and Co).</p> |
