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A platform for research: civil engineering, architecture and urbanism
FERRITE CALCINED BODY, FERRITE SINTERED MAGNET, AND MANUFACTURING METHOD THEREOF
To provide a ferrite sintered magnet that has a high Br and a small decrease in HcJ, and uses less La than a conventional Ca-La-Co-based ferrite sintered magnet by reducing the amount of Co used by 25% or more compared to a general Sr-La-Co-based ferrite sintered magnet.SOLUTION: In a general formula indicating the atomic ratio of metal elements of Ca, R, A, Fe, Co, and Zn: Ca1-x-x'RxAx'Fe2n-y-zCoyZnz, in a ferrite calcined body, x, x', y, and z, and n (2n is a molar ratio, and 2n=(Fe+Co+Zn)/(Ca+R+A)) satisfies 0.1≤x≤0.4, 0x, and 4.5≤n≤5.5.SELECTED DRAWING: None
【課題】高いＢｒを有しかつＨｃＪの低下が少なく、一般的なＳｒ−Ｌａ−Ｃｏ系フェライト焼結磁石よりもＣｏの使用量を２５％以上削減し、さらに従来のＣａ−Ｌａ−Ｃｏ系フェライト焼結磁石よりもＬａの使用量を削減したフェライト焼結磁石の提供。【解決手段】Ｃａ、Ｒ、Ａ、Ｆｅ、Ｃｏ及びＺｎの金属元素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（２ｎはモル比であって、２ｎ＝（Ｆｅ＋Ｃｏ＋Ｚｎ）／（Ｃａ＋Ｒ＋Ａ）で表される）が、０．１≦ｘ≦０．４、０＜ｘ’≦０．３、０＜ｙ＜０．１５、０＜ｚ＜０．１５、１−ｘ−ｘ’＞ｘ、及び４．５≦ｎ≦５．５、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 sintered magnet that has a high Br and a small decrease in HcJ, and uses less La than a conventional Ca-La-Co-based ferrite sintered magnet by reducing the amount of Co used by 25% or more compared to a general Sr-La-Co-based ferrite sintered magnet.SOLUTION: In a general formula indicating the atomic ratio of metal elements of Ca, R, A, Fe, Co, and Zn: Ca1-x-x'RxAx'Fe2n-y-zCoyZnz, in a ferrite calcined body, x, x', y, and z, and n (2n is a molar ratio, and 2n=(Fe+Co+Zn)/(Ca+R+A)) satisfies 0.1≤x≤0.4, 0x, and 4.5≤n≤5.5.SELECTED DRAWING: None
【課題】高いＢｒを有しかつＨｃＪの低下が少なく、一般的なＳｒ−Ｌａ−Ｃｏ系フェライト焼結磁石よりもＣｏの使用量を２５％以上削減し、さらに従来のＣａ−Ｌａ−Ｃｏ系フェライト焼結磁石よりもＬａの使用量を削減したフェライト焼結磁石の提供。【解決手段】Ｃａ、Ｒ、Ａ、Ｆｅ、Ｃｏ及びＺｎの金属元素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（２ｎはモル比であって、２ｎ＝（Ｆｅ＋Ｃｏ＋Ｚｎ）／（Ｃａ＋Ｒ＋Ａ）で表される）が、０．１≦ｘ≦０．４、０＜ｘ’≦０．３、０＜ｙ＜０．１５、０＜ｚ＜０．１５、１−ｘ−ｘ’＞ｘ、及び４．５≦ｎ≦５．５、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) / KOBAYASHI YOSHINORI (author)
2021-04-08
Patent
Electronic Resource
Japanese
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