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    Ferrite core and its production method
    8.
    发明公开
    Ferrite core and its production method 有权
    Ferritkern和Herstellungsverfahren

    公开(公告)号：EP1286368A3

    公开(公告)日：2003-10-29

    申请号：EP02255742.5

    申请日：2002-08-16

    申请人： TDK Corporation

    发明人： Ishida Shigetoshi, c/o TDK corporation ,  Watanabe Masahiko, c/o TDK corporation ,  Yasahara Katsushi, c/o TDK corporation

    IPC分类号： H01F17/04 ,  H01F1/34 ,  C04B35/26

    CPC分类号： H01F41/0246 ,  C04B35/265 ,  C04B2235/3208 ,  C04B2235/3239 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3262 ,  C04B2235/3265 ,  C04B2235/3279 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/604 ,  C04B2235/6583 ,  C04B2235/6584 ,  C04B2235/83 ,  H01F1/344 ,  H01F17/04

    摘要： A ferrite core is provided. This ferrite core has high saturation flux density at a high temperature of 100°C or higher, and in particular, at around 150°C, and has excellent magnetic stability at a high temperature, experiencing reduced deterioration of magnetic properties, and in particular, reduced core loss at such high temperature (even by trading off some improvement in the level of the loss). The ferrite core of the invention contains 56 to 57 mol% of iron oxide calculated in terms of Fe 2 O 3 , 5 to 10 mol% of zinc oxide calculated in terms of ZnO, 3 to 6 mol% of nickel oxide calculated in terms of NiO, and the balance of manganese oxide (MnO) as its main components, and when the main components has a composition represented by the formula:(Zn2+ a, Ni2+ b, Mn2+ c, Mn3+ d, Fe2+ e, Fe3+ f) O4+δ (1) wherein a, b, c, d, e and f meet the relations:a + b + c + d + e + f = 3, andδ= a + b + c + (3/2)d + e +(3/2)f - 4 the value of δ in formula (1) is such that:0 ≤ δ ≤ 0.001.

    摘要翻译： 提供铁氧体磁芯。 该铁氧体磁芯在100℃以上的高温，特别是约150℃的高温下具有高的饱和磁通密度，并且在高温下具有优异的磁稳定性，经历磁特性降低的恶化， 在如此高的温度下降低核心损失（即使通过减少损失水平的一些改善）。 本发明的铁氧体磁心含有按Fe2O3计算的56〜57摩尔％的氧化铁，按ZnO计算为5〜10摩尔％的氧化锌，以NiO计算为3〜6摩尔％的氧化镍， 氧化锰（MnO）作为其主要成分的平衡，当主要成分具有由下式表示的组成时：（Zn 2+），Ni 2+，Mn 2+ ，其中a，b，c，d，e和f满足关系：，其中a，b，c，d，e和f满足关系： a + b + c + d + e + f = 3，和ΔD= a + b + c +（3/2）d + e +（3/2）f-4 >式（1）中δ的值为：0≤δ≤0.001。

    Sintered magnet and method for production thereof
    9.
    发明公开
    Sintered magnet and method for production thereof 审中-公开
    Sintermagnet undzugehörigesHerstellungsverfahren

    公开(公告)号：EP1675134A3

    公开(公告)日：2007-01-24

    申请号：EP05112795.9

    申请日：2005-12-22

    申请人： Hengdian Group EMEGC Magnetics Co Ltd

    发明人： He, Shijin ,  He, Zhenyu ,  He, Junyi ,  Ding, Boming ,  Bao, Daxin

    IPC分类号： H01F1/10 ,  H01F41/02 ,  C04B35/26

    CPC分类号： C04B35/2633 ,  C01G45/1221 ,  C01G49/0018 ,  C01G49/0036 ,  C01G49/009 ,  C01G51/006 ,  C01P2002/50 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/42 ,  C01P2006/80 ,  C04B35/6263 ,  C04B35/62685 ,  C04B35/63 ,  C04B35/632 ,  C04B35/636 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3227 ,  C04B2235/3272 ,  C04B2235/3274 ,  C04B2235/3275 ,  C04B2235/3277 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/36 ,  C04B2235/449 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/602 ,  C04B2235/605 ,  C04B2235/767 ,  C04B2235/77 ,  C04B2235/83 ,  C04B2235/85 ,  H01F1/10 ,  H01F41/0266

    摘要： The present invention relates to a sintered magnet, which has one Curie temperature and comprises the primary phase of a hexagonal ferrite in chemical formula A 1-x M x Fe 12-y R y O 19 , wherein A represents at least one element selected from Sr, Ba and Ca, M represents at least one element selected from the group consisting of rare earth elements and Bi, and must contain La as essential component, R represents at least one element selected from Co, Mn, Zn, Ge and As, and must contain Co as essential component, and the chemical valence of Co is +3, the subscript x and y are the molar ratio, 0 ≤ x ≤ 0.5, 0 ≤ y ≤ 0.5, x and y are not zero at the same time. The present invention provides another sintered magnet, which has one Curie temperature and comprises the primary phase of a hexagonal ferrite in chemical formula A 1-x M x [(Fe(III) a Fe(II) 1□a ) 12-y R y ] z O 19 , wherein A represents Sr or/and Ba, M represents at least one element selected from the group consisting of rare earth elements and Bi, and must contain La as essential component, R represents at least one element selected from Co, Ti, Mn, Zn, Ge, As and W, and must contain Co as essential component, and the chemical valence of Co is +3, the subscript x, y, z and a are the molar ratio, 0.05 ≤ x ≤ 0.5, 0.05 ≤ y ≤ 0.5, 0.8 ≤ z ≤ 1.2, 0.997 ≤ a ≤ 0.9995. The process for producing above-mentioned sintered magnet includes the first mixing and presintering, which cause the crystal structure of the ferrite almost perfect and the crystal grain compact. Then the mixture is secondly sintered after adding a little of additives. In this way the density of the sintered magnet is increased, besides the growth of the grain is prohibited in the process of sintering, so both Br and HcJ of the ferrite magnet are increased. Further, the crystal magnetic anisotropy constant K 1 and the intrinsic coercive force (HcJ) are improved and optimal magnetic property is obtained, the technique of the prior art is greatly simplified by means of addition of Co 3+ and optimization of the ration of the raw materials.

    摘要翻译： 本发明涉及具有一个居里温度并包含化学式A 1-x M x Fe 12-y R y O 19的六方晶系铁氧体的主相的烧结磁体，其中A表示选自以下的至少一种元素： Sr，Ba和Ca，M表示选自稀土元素和Bi中的至少一种元素，并且必须含有La作为必要成分，R表示选自Co，Mn，Zn，Ge和As中的至少一种元素， 并且必须含有Co作为必需组分，Co的化学价为+3，下标x和y为摩尔比，0‰¤x‰¤0.5，‰¤‰¤0.5，x和y不为零 与此同时。 本发明提供另一种烧结磁体，其具有一个居里温度并且包含化学式A 1-x M x [（Fe（III）a Fe（II）1-¡）12-y中的六方晶系铁氧体的主相 R y] z O 19，其中A表示Sr或/和Ba，M表示选自稀土元素和Bi中的至少一种元素，并且必须含有La作为必需成分，R表示选自 Co，Ti，Mn，Zn，Ge，As和W，并且必须含有Co作为必要成分，Co的化学价为+3，下标x，y，z和a为摩尔比，0.05‰× ‰¤0.5,0.05‰¤‰¤0.5，0.8‰¤‰¤1.2，0.997‰¤a‰¤0.9995。 制造上述烧结磁体的方法包括第一混合和预烧结，这使得铁氧体的晶体结构几乎完美，晶粒致密。 然后在加入少量添加剂后将混合物二次烧结。 以这种方式，烧结磁体的密度增加，除了在烧结过程中禁止晶粒生长之外，铁素体磁体的Br和HcJ均增加。 此外，提高了晶体磁各向异性常数K 1和固有矫顽力（HcJ），获得了最佳的磁特性，通过添加Co 3+，大大简化了现有技术的技术，并优化了 原料。