摘要:
A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFe2+aFe3+bO27 (wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5≦a≦2.1; and 12.9≦b≦16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt % in terms of CaCO3) and/or a Si constituent (0.2 to 1.4 wt % in terms of SiO2), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt % in terms of Al2O3), a W constituent (0.01 to 0.6 wt % in terms of WO3), a Ce constituent (0.001 to 0.6 wt % in terms of CeO2), a Mo constituent (0.001 to 0.16 wt % in terms of MoO3), and a Ga constituent (0.001 to 15 wt % in terms of Ga2O3).
摘要翻译:提供了包括W型主相的铁氧体磁性材料,其通过优化添加剂而具有改进的磁性能。 铁氧体磁性材料包括具有由组成式AFe2 + aFe3 + bO27表示的化合物的主要成分(其中A包含选自Sr,Ba和Pb中的至少一种元素; 1.5 <= a <= 2.1;和12.9 <= b < = 16.3),含有Ca成分(按CaCO3计为0.3〜3.0重量%)和/或Si成分(以SiO 2换算为0.2〜1.4重量%)的第一添加剂,以及含有至少一种 Al成分(Al 2 O 3为0.01〜1.5重量%),W成分(WO 3为0.01〜0.6重量%),Ce成分(CeO 2为0.001〜0.6重量%),Mo成分(0.001〜 0.16重量%的MoO 3)和Ga成分(按Ga 2 O 3换算为0.001〜15重量%)。
摘要:
A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFe2+aFe3+bO27 (wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5≦a≦2.1; and 12.9≦b≦16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt % in terms of CaCO3) and/or a Si constituent (0.2 to 1.4 wt % in terms of SiO2), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt % in terms of Al2O3), a W constituent (0.01 to 0.6 wt % in terms of WO3), a Ce constituent (0.001 to 0.6 wt % in terms of CeO2), a Mo constituent (0.001 to 0.16 wt % in terms of MoO3), and a Ga constituent (0.001 to 15 wt % in terms of Ga2O3).
摘要翻译:提供了包括W型主相的铁氧体磁性材料,其通过优化添加剂而具有改进的磁性能。 铁氧体磁性材料包括具有由组成式AFe 2 +和/或Fe 3+组成的化合物的主要成分 (其中A包含选自Sr,Ba和Pb中的至少一种元素; 1.5 <= a <= 2.1;和12.9 <= b <= 16.3),含有Ca 成分(以CaCO 3 3计为0.3〜3.0重量%)和/或Si成分(以SiO 2 2计为0.2〜1.4重量%),第二添加剂 含有Al成分中的至少一种(按Al 2 O 3 3计算为0.01〜1.5重量%),W成分(按WO排列为0.01〜0.6重量% 3成分),Ce成分(按CeO 2计算为0.001〜0.6重量%),Mo成分(按MoO 3计为0.001〜0.16重量% )和Ga成分(按Ga 2 O 3 3换算为0.001〜15重量%)。
摘要:
The present invention provides a ferrite magnetic material comprising as a main constituent a compound represented by a composition formula, AFe2+aFe3+bO27 (wherein 1.1≦a≦2.4, 12.3≦b≦16.1; and A comprises at least one element selected from Sr, Ba and Pb), and also comprising as additives a Ca constituent in terms of CaCO3 and a Si constituent in terms of SiO2 so as to satisfy the relation CaCO3/SiO2=0.5 to 1.38 (molar ratio). By making the relation CaCO3/SiO2=0.5 to 1.38 (molar ratio) be satisfied, the coercive force (HcJ) and the residual magnetic flux density (Br) can be made to simultaneously attain high levels.
摘要:
W-type ferrite has improved magnetic properties, in particular, coercive force. A high coercive force (HcJ) and a high residual magnetic flux density (Br) can be simultaneously attained by a ferrite magnetic material comprising an oxide having a composition wherein metal elements Sr, Ba and Fe in total have a composition ratio represented by the formula Sr(1−x)BaxFe2+aFe3+b in which 0.03≦x≦0.80, 1.1≦a≦2.4, and 12.3≦b≦16.1. The ferrite magnetic material can form any of a ferrite sintered magnet, a ferrite magnet powder, a bonded magnet as a ferrite magnet powder dispersed in a resin, and a magnetic recording medium as a film-type magnetic phase. As for the ferrite sintered magnet, there can be attained a fine sintered structure that has a mean grain size of 0.6 μm or less.
摘要翻译:W型铁氧体具有改善的磁特性,特别是矫顽力。 可以通过包含具有以下成分的氧化物的铁氧体磁性材料同时获得高矫顽力(HcJ)和高剩余磁通密度(Br),其中金属元素Sr,Ba和Fe总计具有由式 Sr 1(1-x)Ba x Fe 2+ + 3 Fe 3+ 其中0.03 <= x <= 0.80,1.1 <= a <= 2.4和12.3 <= b <= 16.1。 铁氧体磁性材料可以形成铁氧体烧结磁体,铁氧体磁体粉末,作为分散在树脂中的铁氧体磁铁粉末的粘结磁体和作为膜型磁性相的磁记录介质中的任何一种。 对于铁氧体烧结磁体,可以获得平均粒径为0.6μm以下的微细烧结体。
摘要:
W-type ferrite has improved magnetic properties, in particular, coercive force. A high coercive force (HcJ) and a high residual magnetic flux density (Br) can be simultaneously attained by a ferrite magnetic material comprising an oxide having a composition wherein metal elements Sr, Ba and Fe in total have a composition ratio represented by the formula Sr(1−x)BaxFe2+aFe3+b in which 0.03 ≦x≦0.80, 1.1≦a≦2.4, and 12.3≦b≦16.1. The ferrite magnetic material can form any of a ferrite sintered magnet, a ferrite magnet powder, a bonded magnet as a ferrite magnet powder dispersed in a resin, and a magnetic recording medium as a film-type magnetic phase. As for the ferrite sintered magnet, there can be attained a fine sintered structure that has a mean grain size of 0.6 μm or less.
摘要:
The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br+(⅓)HcJ is 6200 or more even by sintering at a temperature of 1150° C. or lower. The ferrite magnetic material includes as a main phase thereof a ferrite phase having a hexagonal structure, the main phase being represented by the following composition formula (1): LaxCamα1−x−m(Fe12−yCoy)z with α representing one or two of Ba and Sr; wherein the constituent ratios of the metal elements constituting the main phase satisfy the following conditions: x and m are the values in a region bounded by the points, A: (0.53, 0.27), B: (0.64, 0.27), C: (0.64, 0.35), D: (0.53, 0.45), E: (0.47, 0.45) and F: (0.47, 0.32) in the (x, m) coordinates shown in FIG. 2; 1.3≦x/yz≦1.8; and 9.5≦12z≦11.0.
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): RxCamA1−x−m(Fe12−yMy)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: (2) 0.13≦m≦0.41: (3) 0.7x−m≦0.15: (4) 0.18≦yz≦0.31: (5) 9.6≦12z≦11.8: (6), and wherein the density of the sintered ferrite magnet is at least 5.05 g/cm3, 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: (7) 1.8≦L/S≦2.5: (8).
摘要:
A ferrite magnet powder is represented by the composition formula AFe2+a(1-x)MaxFe3+bO27, wherein A represents at least one element selected from the group consisting of Sr, Ba, and Pb; and M represents at least one element selected from the group consisting of Zn, Co, Mn, and Ni, and wherein 0.05≦x≦0.80, 1.5≦a≦2.2, and 12≦b≦17. A high saturation magnetization 4πIs can be achieved by the partial substitution of the Fe2+ site of a W-type ferrite with an element M such as Zn within a certain range.
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): RxCamA1−x−m(Fe12−yMy)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: (2) 0.13≦m≦0.41: (3) 0.7x−m≦0.15: (4) 0.18≦yz≦0.31: (5) 9.6≦12z≦11.8: (6), and wherein the density of the sintered ferrite magnet is at least 5.05 g/cm3, 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: (7) 1.8≦L/S≦2.5: (8)
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:RxCamAl-xm(Fe12-yMy)z:( 1),式(1)中的x,m,y和z满足由下式(2) - (6)表示的所有条件:0.2 0.13 0.7x-m0.15:(4)0.18 9.6 <= 12z 并且其中烧结铁氧体磁体的密度为至少5.05g / cm 3,并且烧结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L mum是平均值 对于最大值,S mum是在与六边形结构的c轴方向平行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。 L 1.8L / S
摘要:
The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br+(⅓)HcJ is 6200 or more even by sintering at a temperature of 1150° C. or lower. The ferrite magnetic material includes as a main phase thereof a ferrite phase having a hexagonal structure, the main phase being represented by the following composition formula (1): LaxCamα1−x−m(Fe12−yCoy)z with α representing one or two of Ba and Sr; wherein the constituent ratios of the metal elements constituting the main phase satisfy the following conditions: x and m are the values in a region bounded by the points, A: (0.53, 0.27), B: (0.64, 0.27), C: (0.64, 0.35), D: (0.53, 0.45), E: (0.47, 0.45) and F: (0.47, 0.32) in the (x, m) coordinates shown in FIG. 2; 1.3≦x/yz≦1.8; and 9.5≦12z≦11.0.
摘要翻译:本发明提供一种铁氧体磁性材料,即使在1150℃以下的温度下烧结也能够获得Br +(1/3)HcJ为6200以上的磁特性。 铁氧体磁性材料主要包括具有六方结构的铁素体相,其主相由以下组成式(1)表示:La x Si x Ca α1-x M(Fe 12-y Co y z)Z a,其中α代表一个或两个Ba和 锶 其中构成主相的金属元素的组成比满足以下条件:x和m是由点限定的区域中的值,A:(0.53,0.27),B:(0.64,0 .27),C:( 0.64,0.35),D:(0.53,0.45),E:(0.47,0.45)和F:(0.47,0.32)。 2; 1.3 <= x / yz <= 1.8; 和9.5 <= 12z <= 11.0。