| 摘要 |
PURPOSE:To obtain a composite permanent magnet material having high residual magnetisum and low coercive force and permitting to increase the number of magnetized magnetic poles per unit length by a method wherein at least either one kind of hard ferrite powder or rare earth cobalt powder is mixed with at least one kind of ferromagnetic metal powder or soft ferrite powder. CONSTITUTION:At least one kind of hard ferrite powder represented by general formula MOm (Fe2O3)n (where, M is one kind of two kinds or more of Ba, Pb, Sr, Ca, Co, m and n are positive integers) or rare earth cobalt powder represented by general formula RCo5 or R2Co17 (where, R is one kind or two kinds or more of Sm, Y, Ld, Ce) is used. At least one kind of soft ferrite powder represented by general formula MOm (Fe2O3)n (where M is one kind or two kinds or more of Mn, Zn, Cu, Ni, Mg or the like, m and n are positive integers) and at least one kind of ferromagnetic metal powder such as Fe, Ni, Co or the like is used and these are united by synthetic resin or the like. |
