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公开(公告)号:EP2043112A1
公开(公告)日:2009-04-01
申请号:EP08720931.8
申请日:2008-02-27
申请人: TDK Corporation
CPC分类号: C04B35/2633 , C04B35/2641 , C04B35/6262 , C04B35/632 , C04B2235/32 , C04B2235/3201 , C04B2235/3203 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3277 , C04B2235/3279 , C04B2235/3284 , C04B2235/3286 , C04B2235/3287 , C04B2235/3293 , C04B2235/3294 , C04B2235/3409 , C04B2235/3418 , C04B2235/5409 , C04B2235/5445 , C04B2235/605 , C04B2235/6562 , C04B2235/72 , C04B2235/767 , C04B2235/77 , C04B2235/785 , C04B2235/788 , H01F1/11
摘要: A sintered ferrite magnet having a ferrite phase with a hexagonal structure as the main phase, wherein the composition of the metal elements composing the main phase is represented by the following general formula (1):
R x Ca m A 1-x-m (Fe 12-y M y )z: (1)
x, m, y and z in formula (1) satisfying all of the conditions represented by the following formulas (2)-(6): 0.2 ≤ x ≤ 0.5 0.13 ≤ m ≤ 0.41 0.7 x - m ≤ 0.15 0.18 ≤ yz ≤ 0.31 9.6 ≤ 12 z ≤ 11.8 and wherein the density of the sintered ferrite magnet is at least 5.05 g/cm 3 , and the crystal grains of the sintered ferrite magnet satisfy all of the conditions represented by the following formulas (7) and (8), where L µm is the average for the maximum value and S µm is the average for the minimum value among the diameters passing through the center of gravity of each grains in the crystal cross-section parallel to the c-axis direction of hexagonal structures. L ≤ 0.95 1.8 ≤ L / S ≤ 2.5摘要翻译: 具有六方结构的铁素体相作为主相的烧结铁氧体磁体,其中构成主相的金属元素的组成由以下通式(1)表示:€ƒ€ƒ€ƒ€ƒ€ ƒ€ƒ€ƒRx Ca m A 1-xm(Fe 12-y M y)z:ƒ€ƒ€ƒ€ƒ(1)式(1)中的x,m,y和z满足所有 以下公式(2) - (6)表示的条件:0.2‰¤x‰¤0.5 0.13‰¤‰‰0.41 0.7 ¢x - m‰0.15 0.18‰¤‰¤0.31 9.6‰¤12 ¢z‰¤11.8,其中烧结铁氧体磁体的密度为至少5.05g / cm 3,并且烧结的铁氧体磁体的晶粒满足由下式(7)和(8)表示的所有条件, 其中Lμm是最大值的平均值,Sμm是平行于c轴dir的晶体截面中通过每个晶粒的重心的直径中的最小值的平均值 六角结构。 L‰¤0.95 1.8‰¤L / S‰¤2.5
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公开(公告)号:EP2043112B1
公开(公告)日:2015-04-08
申请号:EP08720931.8
申请日:2008-02-27
申请人: TDK Corporation
CPC分类号: C04B35/2633 , C04B35/2641 , C04B35/6262 , C04B35/632 , C04B2235/32 , C04B2235/3201 , C04B2235/3203 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3277 , C04B2235/3279 , C04B2235/3284 , C04B2235/3286 , C04B2235/3287 , C04B2235/3293 , C04B2235/3294 , C04B2235/3409 , C04B2235/3418 , C04B2235/5409 , C04B2235/5445 , C04B2235/605 , C04B2235/6562 , C04B2235/72 , C04B2235/767 , C04B2235/77 , C04B2235/785 , C04B2235/788 , H01F1/11
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