Rare-earth magnet material, its manufacture, and rare-earth bond magnet using it



(57)【要約】 【課題】 iHcが大きいとともに従来に比べてiHc の温度係数(η)が小さい熱安定性に優れた希土類磁石 材料およびその製造方法ならびにそれを用いた希土類ボ ンド磁石を提供する。 【解決手段】 成分組成がRαFe100-(α+β+γ+δ) MβBγNδであり、単斜晶および/または六方晶の結 晶構造を有したR3(Fe,M,B)29Nyを主相とし て含み、前記RはYを含めた希土類元素のいずれか1種 または2種以上であり、前記MはAl、Ti、V、C r、Mn、Cu、Ga、Zr、Nb、Mo、Hf、T a、Wのいずれか1種または2種以上からなり、前記 α、β、γ、δは原子百分率で下記の範囲にあることを 特徴とする希土類磁石材料。 5≦α≦18 1≦β≦50 0.1≦γ≦5 4≦δ≦30
PROBLEM TO BE SOLVED: To obtain a magnet material having a peculiar large coercive force which has a small temperature coefficient by forming a crystalline structure containing monoclinic and/or hexagonal R3 (Fe, M, B)29 Ny as a main phase by using an R-Fe-B-N magnet material having a specific ratio of components. SOLUTION: A rare-earth magnet material has a composition of RαFe100-(α+β+γ+δ) Mβ Bγ Nδcontaining monoclinic and/or hexagonal R3 (Fe, M, B)29 Ny as a main phase. The R and Y respectively represent one or two or more kinds of rare-earth elements including Y and one or two or more kinds of elements selected from among Al, Ti, V, Cr, Mn, Cu, Ga, Zr, Nb, Mo, Hf, Ta, and W and the α, β, γ, and δ are atomic percentages respectively set at 5<=α<=18, 1<=β<=50, 0.1<=γ<=5, and 4<=δ<=30. Therefore, a rare-earth magnet material and a bond magnet having high Curie temperatures and high thermal stability can be obtained.




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    US-7087185-B2August 08, 2006Seiko Epson CorporationMagnetic powder and isotropic bonded magnet