A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
FERRITE CALCINED BODY POWDER AND METHOD FOR PRODUCING FERRITE SINTERED MAGNET
To provide a high performance ferrite sintered magnet inexpensively, in which the amount of Co used is reduced as compared to the conventional SrLaCo magnets.SOLUTION: A ferrite sintered magnet is produced by using ferrite calcined body powder that is characterized in that, in the general formula: Ca1-x-yRxAyFe2n-zCoz showing the atomic ratio of metal elements of Ca, R, A, Fe and Co (where, R is at least one rare earth element and essentially contains La, and A is Sr and/or Ba), the x, y, z and n (where 2n is a molar ratio and represented as 2n=(Fe+Co)/(Ca+R+A)) satisfy 0.30≤1-x-y≤0.55, 0.25≤x≤0.35, 0.15≤y≤0.40, 1-x-y>y, 0<11.0. and the average particle size of the ferrite calcined body powder is more than 0.65 μm.SELECTED DRAWING: None
【課題】従来のSrLaCo磁石よりもCoの使用量を削減した高性能なフェライト焼結磁石を安価に提供する。【解決手段】 Ca、R、A、Fe及びCoの金属元素（ただし、Rは希土類元素の少なくとも1種であってLaを必須に含む元素、AはSr及び／又はBa）の原子比を示す一般式：Ca1-x-yRxAyFe2n-zCozにおいて、前記x、y及びz並びにn（ただし、2nはモル比であって、2n＝（Fe+Co）／（Ca+R+A）で表される）が、0.30≦1-x-y≦0.55、0.25≦x≦0.35、0.15≦y≦0.40、1-x-y＞y、0＜z≦0.18、及び9.0≦2n-z＜11.0を満足し、平均粒径が0.65μｍを超えるフェライト仮焼体粉末を用いてフェライト焼結磁石を製造する。【選択図】なし
FERRITE CALCINED BODY POWDER AND METHOD FOR PRODUCING FERRITE SINTERED MAGNET
To provide a high performance ferrite sintered magnet inexpensively, in which the amount of Co used is reduced as compared to the conventional SrLaCo magnets.SOLUTION: A ferrite sintered magnet is produced by using ferrite calcined body powder that is characterized in that, in the general formula: Ca1-x-yRxAyFe2n-zCoz showing the atomic ratio of metal elements of Ca, R, A, Fe and Co (where, R is at least one rare earth element and essentially contains La, and A is Sr and/or Ba), the x, y, z and n (where 2n is a molar ratio and represented as 2n=(Fe+Co)/(Ca+R+A)) satisfy 0.30≤1-x-y≤0.55, 0.25≤x≤0.35, 0.15≤y≤0.40, 1-x-y>y, 0<11.0. and the average particle size of the ferrite calcined body powder is more than 0.65 μm.SELECTED DRAWING: None
【課題】従来のSrLaCo磁石よりもCoの使用量を削減した高性能なフェライト焼結磁石を安価に提供する。【解決手段】 Ca、R、A、Fe及びCoの金属元素（ただし、Rは希土類元素の少なくとも1種であってLaを必須に含む元素、AはSr及び／又はBa）の原子比を示す一般式：Ca1-x-yRxAyFe2n-zCozにおいて、前記x、y及びz並びにn（ただし、2nはモル比であって、2n＝（Fe+Co）／（Ca+R+A）で表される）が、0.30≦1-x-y≦0.55、0.25≦x≦0.35、0.15≦y≦0.40、1-x-y＞y、0＜z≦0.18、及び9.0≦2n-z＜11.0を満足し、平均粒径が0.65μｍを超えるフェライト仮焼体粉末を用いてフェライト焼結磁石を製造する。【選択図】なし
FERRITE CALCINED BODY POWDER AND METHOD FOR PRODUCING FERRITE SINTERED MAGNET
フェライト仮焼体粉末及びフェライト焼結磁石の製造方法
KOBAYASHI YOSHINORI (author)
2022-10-03
Patent
Electronic Resource
Japanese
FERRITE CALCINED BODY METHOD FOR PRODUCING FERRITE SINTERED MAGNET AND FERRITE SINTERED MAGNET
European Patent Office | 2018
Ferrite calcined body, method for producing ferrite sintered magnet, and ferrite sintered magnet
| European Patent Office | 2015
FERRITE CALCINED BODY, METHOD FOR PRODUCING FERRITE SINTERED MAGNET, AND FERRITE SINTERED MAGNET
| European Patent Office | 2019
FERRITE CALCINED BODY, SINTERED FERRITE MAGNET, AND METHOD FOR MANUFACTURING SINTERED FERRITE MAGNET
| European Patent Office | 2024
FERRITE CALCINED BODY MANUFACTURING METHOD OF FERRITE SINTERED MAGNET
| European Patent Office | 2022