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FERRITE CALCINED BODY, FERRITE SINTERED MAGNET AND MANUFACTURING METHOD THEREOF
To provide a ferrite calcined body and a ferrite sintered magnet which have high Br and less decrease in HcJ, and in which the usage amount of Co and La is more reduced than conventional Ca-La-Co ferrite sintered magnets, and a manufacturing method thereof.SOLUTION: In a ferrite calcined body, the atomic ratio of metallic elements of Ca, R, A, Fe, Co and Zn (where, R represents an element which is at least one of rare earth elements and which essentially contains La, and A represents Sr and/or Ba) is represented by general formula: Ca1-x-x'RxAx'Fe2n-y-zCoyZnz where the x, x', y and z, and the n (provided that 2n is a molar ratio and represented as 2n=(Fe+Co+Zn)/(Ca+R+A))satisfy 0.40≤x<0.5, 0<1-x-x', 4.5≤n≤5.5, and 2n-y-z≥10x'+8.5.SELECTED DRAWING: None
【課題】本開示の実施形態によれば、高いＢｒを有し、ＨｃＪの低下が少なく、従来のＣａ−Ｌａ−Ｃｏ系フェライト焼結磁石よりもＣｏとＬａの使用量を削減したフェライト仮焼体、フェライト焼結磁石及びその製造方法の提供が可能となる。【解決手段】Ｃａ、Ｒ、Ａ、Ｆｅ、Ｃｏ及びＺｎの金属元素（ただし、Ｒは希土類元素の少なくとも一種であってＬａを必須に含む元素、ＡはＳｒおよび／またはＢａ）の原子比を示す一般式：Ｃａ１−ｘ−ｘ’ＲｘＡｘ’Ｆｅ２ｎ−ｙ−ｚＣｏｙＺｎｚにおいて、前記ｘ、ｘ’、ｙ及びｚ、並びにｎ（ただし、２ｎはモル比であって、２ｎ＝（Ｆｅ＋Ｃｏ＋Ｚｎ）／（Ｃａ＋Ｒ＋Ａ）で表される）が、０．４０≦ｘ＜０．５、０＜ｘ’≦０．１０、０．２０＜ｙ＜０．３０、０＜ｚ＜０．０５、ｘ＜１−ｘ−ｘ’、４．５≦ｎ≦５．５、及び２ｎ−ｙ−ｚ≧１０ｘ’＋８．５、を満足するフェライト仮焼体。【選択図】なし
FERRITE CALCINED BODY, FERRITE SINTERED MAGNET AND MANUFACTURING METHOD THEREOF
To provide a ferrite calcined body and a ferrite sintered magnet which have high Br and less decrease in HcJ, and in which the usage amount of Co and La is more reduced than conventional Ca-La-Co ferrite sintered magnets, and a manufacturing method thereof.SOLUTION: In a ferrite calcined body, the atomic ratio of metallic elements of Ca, R, A, Fe, Co and Zn (where, R represents an element which is at least one of rare earth elements and which essentially contains La, and A represents Sr and/or Ba) is represented by general formula: Ca1-x-x'RxAx'Fe2n-y-zCoyZnz where the x, x', y and z, and the n (provided that 2n is a molar ratio and represented as 2n=(Fe+Co+Zn)/(Ca+R+A))satisfy 0.40≤x<0.5, 0<1-x-x', 4.5≤n≤5.5, and 2n-y-z≥10x'+8.5.SELECTED DRAWING: None
【課題】本開示の実施形態によれば、高いＢｒを有し、ＨｃＪの低下が少なく、従来のＣａ−Ｌａ−Ｃｏ系フェライト焼結磁石よりもＣｏとＬａの使用量を削減したフェライト仮焼体、フェライト焼結磁石及びその製造方法の提供が可能となる。【解決手段】Ｃａ、Ｒ、Ａ、Ｆｅ、Ｃｏ及びＺｎの金属元素（ただし、Ｒは希土類元素の少なくとも一種であってＬａを必須に含む元素、ＡはＳｒおよび／またはＢａ）の原子比を示す一般式：Ｃａ１−ｘ−ｘ’ＲｘＡｘ’Ｆｅ２ｎ−ｙ−ｚＣｏｙＺｎｚにおいて、前記ｘ、ｘ’、ｙ及びｚ、並びにｎ（ただし、２ｎはモル比であって、２ｎ＝（Ｆｅ＋Ｃｏ＋Ｚｎ）／（Ｃａ＋Ｒ＋Ａ）で表される）が、０．４０≦ｘ＜０．５、０＜ｘ’≦０．１０、０．２０＜ｙ＜０．３０、０＜ｚ＜０．０５、ｘ＜１−ｘ−ｘ’、４．５≦ｎ≦５．５、及び２ｎ−ｙ−ｚ≧１０ｘ’＋８．５、を満足するフェライト仮焼体。【選択図】なし
FERRITE CALCINED BODY, FERRITE SINTERED MAGNET AND MANUFACTURING METHOD THEREOF
フェライト仮焼体、フェライト焼結磁石及びその製造方法
TANIOKU YASUAKI (author)
2021-09-27
Patent
Electronic Resource
Japanese
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