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2. 发明公开

EP1598835A4 FERRITE MAGNET POWDER, SINTERED MAGNET, BOND MAGNET AND MAGNETIC RECORDING MEDIUM 审中-公开
标题翻译：铁素体磁性粉末，烧结磁体，粘结磁记录介质UNDMAGNETISCHES
公开(公告)号：EP1598835A4
公开(公告)日：2008-06-25
申请号：EP04708498
申请日：2004-02-05
申请人： TDK CORP
发明人： MINACHI YOSHIHIKO , ITO NOBORU
IPC分类号： H01F1/34 , C04B35/26 , G11B5/706 , H01F1/11 , H01F1/113
CPC分类号： C04B35/2608 , C01G49/0036 , C01G49/0063 , C01G49/0072 , C01G49/009 , C01P2002/72 , C01P2004/03 , C01P2006/42 , C04B35/2633 , C04B35/6265 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3262 , C04B2235/3275 , C04B2235/3279 , C04B2235/3284 , C04B2235/3418 , C04B2235/5445 , C04B2235/605 , C04B2235/652 , C04B2235/77 , G11B5/70678 , H01F1/11 , H01F1/113 , Y10T428/32
摘要： Ferrite magnet powder of the composition formula AFe2+a(1-x)MaxFe3+bO27 (wherein A represents at least one element selected from among Sr, Ba and Pb, and M represents at least one element selected from among Zn, Co, Mn and Ni), wherein 0.05 ≤ x ≤ 0.80, 1.5 ≤ a ≤ 2.2 and 12 ≤ b ≤ 17. High saturation magnetization 4πIs can be obtained by the thus effected substitution of portion of the Fe2+ sites of W type ferrite with element M such as Zn within given range.

3. 发明专利

HK1132084A1 FERRITE SINTERED MAGNET 未知
公开(公告)号：HK1132084A1
公开(公告)日：2010-02-12
申请号：HK09109890
申请日：2009-10-27
申请人： TDK CORP
发明人： YANAGIDA SHIGEKI , ITO NOBORU , ABURAKAWA YUUKI , MORI NAOKI , MINACHI YOSHIHIKO
IPC分类号： C04B20060101 , H01F20060101
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): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR x Ca m A 1-x-m (Fe 12-y M y )z:€ƒ€ƒ€ƒ€ƒ€ƒ(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

4. 发明专利

HK1106969A1 FERRITE MAGNETIC MATERIAL 未知
公开(公告)号：HK1106969A1
公开(公告)日：2008-03-20
申请号：HK08100595
申请日：2008-01-17
申请人： TDK CORP
发明人： MINACHI YOSHIHIKO , ITO NOBORU , ABURAKAWA YUUKI , FUJIKAWA YOSHINORI , UEDA SATOKO
IPC分类号： H01F20100101
摘要： The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br + (1/3) 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) : La x Ca m ± 1-x-m (Fe 12-y CO y ) z with ±, 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.

5. 发明专利

DE602006001723D1 未知
公开(公告)号：DE602006001723D1
公开(公告)日：2008-08-21
申请号：DE602006001723
申请日：2006-12-18
申请人： TDK CORP
发明人： MINACHI YOSHIHIKO , ITO NOBORU , ABURAKAWA YUUKI , FUJIKAWA YOSHINORI , UEDA SATOKO
IPC分类号： C04B35/40 , C04B35/32
摘要： The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br + (1/3) 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) : La x Ca m ± 1-x-m (Fe 12-y CO y ) z with ±, 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.

6. 发明专利

AT400536T 未知
公开(公告)号：AT400536T
公开(公告)日：2008-07-15
申请号：AT06026194
申请日：2006-12-18
申请人： TDK CORP
发明人： MINACHI YOSHIHIKO , ITO NOBORU , ABURAKAWA YUUKI , FUJIKAWA YOSHINORI , UEDA SATOKO
IPC分类号： C04B35/40 , C04B35/32
摘要： The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br + (1/3) 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) : La x Ca m ± 1-x-m (Fe 12-y CO y ) z with ±, 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.

7. 发明专利

HK1091803A1 Ferrite sintered magnet 未知
公开(公告)号：HK1091803A1
公开(公告)日：2007-01-26
申请号：HK06112421
申请日：2006-11-10
申请人： TDK CORP
发明人： MINACHI YOSHIHIKO , NAGAOKA JUNICHI , KURASAWA SYUNSUKE , ITO NOBORU , MURASE TAKU , MASUDA TAKESHI , TAKAGAWA KENYA , UMEDA HIDENOBU
IPC分类号： C04B20060101 , C01G49/00 , C04B35/26 , C04B35/632 , H01F20060101 , H01F1/10 , H01F1/11
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 AFe 2+ a Fe 3+ b O 27 (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 CaCO 3 ) and/or a Si constituent (0.2 to 1.4 wt% in terms of SiO 2 ), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt% in terms of Al 2 O 3 ), a W constituent (0.01 to 0.6 wt% in terms of WO 3 ), a Ce constituent (0.001 to 0.6 wt% in terms of CeO 2 ), a Mo constituent (0.001 to 0.16 wt% in terms of MoO 3 ), and a Ga constituent (0.001 to 15 wt% in terms of Ga 2 O 3 ).

8. 发明专利

JP2007031203A Method for manufacturing w-type ferrite magnet 审中-公开
标题翻译：制造W型铁氧体磁铁的方法
公开(公告)号：JP2007031203A
公开(公告)日：2007-02-08
申请号：JP2005216837
申请日：2005-07-27
申请人： Tdk Corp , Tdk株式会社
发明人： MINACHI YOSHIHIKO , ITO NOBORU , MURASE MIGAKU , MASUDA TAKESHI
IPC分类号： C04B35/26 , H01F1/11 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To improve the residual magnetic flux density of a W-type ferrite magnet on the premise of improvement of the coercive force. SOLUTION: A method for producing the W type ferrite magnet comprises: a calcining process for obtaining a calcined material from a raw material composition in which one or more kinds selected from Li, Na, K and Rb is added in an amount of 0.01-0.9 wt.% expressed in terms of carbonate; a pulverizing process for pulverizing the calcined material to obtain a composition for forming; a forming process for forming the composition for forming; and a sintering process for sintering a formed body obtained in the forming process to obtain a sintered compact. It is preferable that K is added in an amount of 0.05-0.5 wt.% expressed in terms of carbonate into the raw material composition. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在提高矫顽力的前提下，提高W型铁氧体磁体的剩余磁通密度。＆lt; P＆gt;解决方案：一种W型铁氧体磁体的制造方法，其特征在于，包括：从添加有选自Li，Na，K和Rb中的一种或多种的原料组合物获得煅烧材料的煅烧方法， 0.01-0.9重量％以碳酸盐表示; 用于粉碎煅烧材料以获得成型组合物的粉碎方法; 用于形成用于成型的组合物的成形方法; 以及烧结成形体中得到的成形体的烧结工序，得到烧结体。优选以原料组合物中的以碳酸酯表示的0.05〜0.5重量％的量添加K。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2006076860A Method of manufacturing oxide sintered compact and composition 审中-公开
标题翻译：氧化物烧结成型及组成的方法
公开(公告)号：JP2006076860A
公开(公告)日：2006-03-23
申请号：JP2004265088
申请日：2004-09-13
申请人： Tdk Corp , Tdk株式会社
发明人： MINACHI YOSHIHIKO , ITO NOBORU , MURASE MIGAKU , MASUDA TAKESHI
IPC分类号： C04B35/622 , H01F1/06 , H01F1/08 , H01F1/11 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To suppress the segregation of carbon to improve the sintering density even when carbon powder is added as the need arises. SOLUTION: This method of manufacturing an oxide sintered compact is provided with a forming process for forming a mixture containing raw material powder, carbon powder, a non-aqueous solvent and a surfactant and a sintering process for sintering the resultant formed body to obtain the sintered compact. The segregation of the carbon powder is suppressed by incorporating the non-aqueous solvent and the surfactant. In the resultant formed body, low CV (coefficient of variation) value and excellent dispersibility of the carbon powder are attained. COPYRIGHT: (C)2006,JPO&NCIPI

10. 发明专利

JP2005286172A Manufacturing methods of sintered magnet and ferrite magnetic material 审中-公开
标题翻译：烧结磁铁和铁磁材料的制造方法
公开(公告)号：JP2005286172A
公开(公告)日：2005-10-13
申请号：JP2004099446
申请日：2004-03-30
申请人： Tdk Corp , Tdk株式会社
发明人： MINACHI YOSHIHIKO , ITO NOBORU , NAGAOKA JUNICHI , KURASAWA SHUNSUKE , MURASE MIGAKU , MASUDA TAKESHI
IPC分类号： C04B35/26 , H01F1/11 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To improve magnetic characteristics of a W-type ferrite, especially its coercive force. SOLUTION: The manufacturing method of a ferrite magnetic material has a process (a) for calcining the mixture wherein the Ca component of not smaller than 0.01 wt.%, and smaller than 1.0 wt.% obtained when calculating it in terms of CaCO 3 is added to the raw-material powder containing an A component (where A represents one or more kinds of elements selected from Sr, Ba, and Pb) and an Fe component; a process (b) for crushing the calcined material obtained in the process (a); a process (c) for molding in a magnetic field the crushed powder obtained in the process (b); and a process (d) for so baking the molded body obtained in the process (c) as to obtain the sintered body whose magnetic phase is a hexagonal crystal W-type ferrite. Since the crystal grains of the sintered body are made fine by adding the Ca component of the predetermined quantity to the raw-material powder when blending the raw-material powder, the coercive force (HcJ) of the ferrite magnetic material which exceeds 30,000e can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了改善W型铁氧体的磁特性，特别是其矫顽力。铁氧体磁性材料的制造方法具有煅烧混合物的方法（a），其中当Ca成分计算为0.01重量％以上且小于1.0重量％时，向含有A成分（其中A表示选自Sr，Ba和Pb中的一种或多种元素）和Fe成分的原料粉末中加入CaCO 3 SBS 3 用于破碎方法（a）中获得的煅烧材料的方法（b）; 用于在磁场中模制在方法（b）中获得的粉碎粉末的方法（c）; 以及（c）工序中得到的成型体的烧成体（d），得到磁性相为六方晶W型铁氧体的烧结体。由于通过在混合原料粉末时向原料粉末中添加规定量的Ca成分使烧结体的晶粒细化，所以铁素体磁性材料的矫顽力（HcJ）超过30,000e可以得到。版权所有（C）2006，JPO＆NCIPI

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