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1. 发明授权

US06506264B1 Ferromagnetic powder 有权
标题翻译：铁磁粉
公开(公告)号：US06506264B1
公开(公告)日：2003-01-14
申请号：US09601942
申请日：2000-08-10
申请人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Akio Sawabe , Akito Inoue , Kenichi Inoue
发明人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Akio Sawabe , Akito Inoue , Kenichi Inoue
IPC分类号： H01F1055
CPC分类号： H01F1/06 , B22F1/0011 , C22C33/0285 , G11B5/70621 , G11B5/714
摘要： A ferromagnetic powder containing iron as the principal component and containing more than 5 to 50 at. % Co, 0.1 to 30 at. % Al, 0.1 to 10 at. % of a rare earth element inclusive of Y, 0.05% by weight or less of an element belonging to Group 1a of the Periodic Table, and 0.1% by weight or less (inclusive of 0% by weight) of an element belonging to Group 2a of the Periodic Table, the powder comprising flat acicular particles having a mean major axis length of 0.01 to 0.40 &mgr;m and a crystallite diameter as determined by X-ray diffraction (Dx) of 50 to 250 angstrom, provided that the cross section diameter in the minor axis direction cut perpendicular to the major axis has a larger width and a smaller width, and that this cross section ratio in the minor axis direction, which is a larger width to smaller width ratio, uniformly yields a value of greater than 1, preferably 1.5 or higher, and the powder yielding a &sgr;s/Dx ratio of 0.7 or higher, wherein, &sgr;s represents the saturation magnetization and Dx represents the crystallite size determined by X-ray diffraction.
摘要翻译：含有铁作为主要成分并含有5〜50个以上的铁磁粉末。％Co，0.1〜30at。％Al，0.1〜10at。含有Y的稀土元素的％，属于元素周期表的第1a族的元素的0.05重量％以下，属于第2a族的元素的0.1重量％以下（包括0重量％）的周期表的粉末，该粉末包含平均长轴长度为0.01至0.40μm的扁平针状颗粒和通过X射线衍射测定的微晶直径（Dx）为50至250埃，条件是在垂直于长轴的短轴方向具有较大的宽度和较小的宽度，并且短径方向上的宽度与宽度比较大的横截面比均匀地产生大于1的值，优选地 1.5或更高，并且产生0.7或更高的sigmas / Dx比的粉末，其中sigmas表示饱和磁化强度，Dx表示通过X射线衍射确定的微晶尺寸。

2. 发明授权

US5591535A Ferromagnetic metal powder 失效
标题翻译：铁磁金属粉末
公开(公告)号：US5591535A
公开(公告)日：1997-01-07
申请号：US432467
申请日：1995-05-01
申请人： Seiichi Hisano , Kazuhisa Saito , Satoshi Aizawa , Kazushi Sano , Kazuyuki Matsumoto , Kenji Murata
发明人： Seiichi Hisano , Kazuhisa Saito , Satoshi Aizawa , Kazushi Sano , Kazuyuki Matsumoto , Kenji Murata
IPC分类号： G11B5/706 , H01F1/047 , H01F1/055 , G11B5/66
CPC分类号： H01F1/055 , G11B5/70615 , G11B5/70621 , H01F1/047
摘要： There is provided an accicular ferromagnetic metal powder with which one can produce magnetic media for high-density recording that are improved in storage stability and magnetic characteristics.The improved ferromagnetic metal powder essentially consists of iron and 50 atm % based on the amount of iron of cobalt and at least one of aluminum and yttrium or any other rare earth element and contains no more than 0.05 wt % of an element of Group Ia of the periodic table (Li, Na, K). The amount of aluminum is in the range of 0.1-30 atm %, the amount of yttrium or any other rare earth element is in the range of and 0.1-10 atm %, each being based on the total quantity of the metal elements present. In either of these cases, the residue of an element of Group IIa of the periodic table (Mg, Ca, Sr, Ba) is preferably 0.1 wt % or less.
摘要翻译：提供了一种指状铁磁金属粉末，可以制造高密度记录的磁性介质，其具有改善的储存稳定性和磁特性。改进的铁磁性金属粉末基于铁和50atm％，基于钴的量和铝和钇或任何其它稀土元素中的至少一种，并且含有不超过0.05wt％的Ia族元素周期表（Li，Na，K）。铝的量在0.1-30atm％的范围内，钇或任何其它稀土元素的量在0.1-10atm％的范围内，各自以所存在的金属元素的总量为基准。在这些情况下，元素周期表IIa族元素（Mg，Ca，Sr，Ba）的残基优选为0.1重量％以下。

3. 发明授权

US06171692B2 Particle for lower layer of coating type magnetic recording medium 有权
标题翻译：涂层型磁记录介质下层用颗粒
公开(公告)号：US06171692B2
公开(公告)日：2001-01-09
申请号：US09501993
申请日：2000-02-11
申请人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Shinichi Konno , Yoshichika Horikawa , Yasuhiko Aihara
发明人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Shinichi Konno , Yoshichika Horikawa , Yasuhiko Aihara
IPC分类号： G11B05733
CPC分类号： C09C1/22 , B82Y30/00 , C01G49/0018 , C01G49/0045 , C01G49/0054 , C01G49/06 , C01P2004/03 , C01P2004/10 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2006/10 , C01P2006/11 , C01P2006/12 , C01P2006/22 , C01P2006/37 , C01P2006/42 , C09C1/24 , G11B5/738 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/26
摘要： Iron oxyhydroxide particles that are composed of acicular particles having an average major axis of 0.01 to 0.5 &mgr;m and containing not less than 0.1 wt. % and not more than 30 wt. % of Al in the iron oxyhydroxide and that release not less than 0.1 wt. % and not more than 2 wt. % of H2O at 100° C. are used as particles of a lower layer of a coating type magnetic recording medium having a multi-layer structure. The acicular particles include ones having two or more branches whose branching direction is skewed toward a two-dimensional orientation.
摘要翻译：由具有平均长径为0.01〜0.5μm，含有0.1wt。以上0.5μm以上的针状粒子构成的羟基氧化铁粒子。％且不大于30wt。羟基氧化铁中的Al的百分比，释放量不小于0.1重量％。％且不大于2wt。 100℃下的H 2 O％用作具有多层结构的涂层型磁记录介质的下层的颗粒。针状粒子包括具有分支方向朝向二维取向倾斜的两个以上分支的针状粒子。

4. 发明授权

US5902676A Coating type magnetic recording medium having a multilayer structure 失效
标题翻译：具有多层结构的涂层型磁记录介质
公开(公告)号：US5902676A
公开(公告)日：1999-05-11
申请号：US917921
申请日：1997-08-27
申请人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Shinichi Konno , Yoshichika Horikawa , Yasuhiko Aihara
发明人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Shinichi Konno , Yoshichika Horikawa , Yasuhiko Aihara
IPC分类号： C01G49/02 , B22F1/00 , G11B5/706 , G11B5/738 , H01F1/047 , H01F1/22 , B32B5/16
CPC分类号： G11B5/738 , G11B5/70621 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/26
摘要： A coating type magnetic recording medium having a multilayer structure exhibits excellent strength, surface smoothness, and weather resistance is formed on a substrate, and comprises a magnetic layer of magnetic particles dispersed in a resinous binder, and a non-magnetic layer of non-magnetic particles dispersed in a resinous binder. The magnetic particles are composed of acicular ferromagnetic metal particles of Fe containing Co, Al, rare earth elements, periodic table group 1a and 2a elements. The non-magnetic particles are composed of acicular particles of .alpha.-FeOOH.
摘要翻译：具有多层结构的涂层型磁记录介质在基板上形成优异的强度，表面光滑度和耐候性，并且包括分散在树脂粘结剂中的磁性颗粒的磁性层和非磁性的非磁性层分散在树脂粘合剂中的颗粒。磁性颗粒由含有Co，Al，稀土元素，周期表组1a和2a元素的Fe的针状铁磁性金属颗粒组成。非磁性颗粒由α-FeOOH的针状颗粒组成。

5. 发明授权

US06440545B1 Powder for use in lower layer of coating type magnetic recording medium 有权
标题翻译：用于下层涂料型磁记录介质的粉末
公开(公告)号：US06440545B1
公开(公告)日：2002-08-27
申请号：US09601890
申请日：2000-08-09
申请人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Yoshichika Horikawa
发明人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Yoshichika Horikawa
IPC分类号： G11B516
CPC分类号： B82Y30/00 , C01G49/06 , C01G49/08 , C01P2004/03 , C01P2004/04 , C01P2004/10 , C01P2004/22 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2006/11 , C01P2006/12 , C01P2006/82 , C09C3/006 , C09C3/12 , G11B5/738 , Y10S428/90 , Y10T428/24975 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/2991
摘要： A powder for use in the lower layer of a coating magnetic recording medium, comprising acicular particles with a mean major axis length in a range of from 0.01 to 0.5 &mgr;m and a mean minor axis length in a range of from 0.01 to 0.05 &mgr;m, provided that the acicular particles are flat acicular particles which, when cut in a direction perpendicular to the major axis, uniformly exhibit a cross section having a larger width to smaller width ratio of greater than 1, and that the quantity of discharged H2O at 100° C. is in a range of from 0.1 to 2.0% by weight.
摘要翻译：一种用于涂层磁记录介质的下层的粉末，其包含平均长轴长度在0.01至0.5μm的平均长轴长度在0.01至0.05μm的范围内的针状颗粒，其提供针状颗粒是扁平针状颗粒，当沿垂直于长轴的方向切割时，均匀地显示具有大于1的较大宽度至较小宽度比的横截面，并且在100℃下排出的H 2 O的量在0.1〜2.0重量％的范围内。

6. 发明授权

US6040043A Particles for lower layer of coating type magnetic recording medium 失效
标题翻译：用于下层涂层型磁记录介质的颗粒
公开(公告)号：US6040043A
公开(公告)日：2000-03-21
申请号：US952438
申请日：1997-11-20
申请人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Shinichi Konno , Yoshichika Horikawa , Yasuhiko Aihara
发明人： Seiichi Hisano , Kazuhisa Saito , Kazushi Sano , Shinichi Konno , Yoshichika Horikawa , Yasuhiko Aihara
IPC分类号： C01G49/00 , C01G49/06 , C09C1/22 , C09C1/24 , G11B5/738 , G11B5/68
CPC分类号： C09C1/22 , B82Y30/00 , C01G49/0018 , C01G49/0045 , C01G49/0054 , C01G49/06 , C09C1/24 , G11B5/738 , C01P2004/03 , C01P2004/10 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2006/10 , C01P2006/11 , C01P2006/12 , C01P2006/22 , C01P2006/37 , C01P2006/42 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/26
摘要： Iron oxyhydroxide particles that are composed of acicular particles having an average major axis of 0.01 to 0.5 .mu.m and containing not less than 0.1 wt. % and not more than 30 wt. % of Al in the iron oxyhydroxide and that release not less than 0.1 wt. % and not more than 2 wt. % of H.sub.2 O at 100.degree. C. are used as particles of a lower layer of a coating type magnetic recording medium having a multi-layer structure. The acicular particles include ones having two or more branches whose branching direction is skewed toward a two-dimensional orientation.
摘要翻译： PCT No.PCT / JP97 / 00927 Sec。 371日期：1997年11月20日 102（e）1997年11月20日日期PCT 1997年3月21日PCT公布。公开号WO97 / 34830 日期1997年9月25日由平均长径为0.01〜0.5μm，含有0.1重量％以上的针状粒子构成的氢氧化正丙烷粒子。％且不大于30wt。羟基氧化铁中的Al的百分比，释放量不小于0.1重量％。％且不大于2wt。 100℃下的H 2 O％用作具有多层结构的涂层型磁记录介质的下层的颗粒。针状粒子包括具有分支方向朝向二维取向倾斜的两个以上分支的针状粒子。

7. 发明授权

US5534361A Ferromagnetic metal powder 失效
标题翻译：铁磁金属粉末
公开(公告)号：US5534361A
公开(公告)日：1996-07-09
申请号：US266227
申请日：1994-06-27
申请人： Seiichi Hisano , Kazuhisa Saito , Satoshi Aizawa , Kazushi Sano , Kazuyuki Matsumoto , Kenji Murata
发明人： Seiichi Hisano , Kazuhisa Saito , Satoshi Aizawa , Kazushi Sano , Kazuyuki Matsumoto , Kenji Murata
IPC分类号： C22C38/00 , G11B5/706 , H01F1/047 , H01F1/055 , G11B5/66
CPC分类号： H01F1/055 , G11B5/70615 , G11B5/70621 , H01F1/047
摘要： There is provided a metallic magnetic powder with which one can produce magnetic media for high-density recording that are improved in storage stability and magnetic characteristics.The improved ferromagnetic metal powder contains no more than 0.05 wt % of an element of Group Ia of the periodic table. The powder may optionally contain 0.1-30 atm % of aluminum and/or 0.1-10 atm % of Y or any other rare earth element based on the total quantity of the metal elements present. In either of these cases, the residue of an element of Group IIa of the periodic table is preferably 0.1 wt % or less.
摘要翻译：提供了一种金属磁性粉末，通过该金属磁性粉末可以产生用于高密度记录的磁性介质，其提高了储存稳定性和磁特性。改进的铁磁性金属粉末含有不超过0.05重量％的元素周期表第Ia族元素。基于存在的金属元素的总量，粉末可以任选地含有0.1-30atm％的铝和/或0.1-10atm％的Y或任何其它稀土元素。在这些情况中的任一种情况下，周期表IIa族的元素的残基优选为0.1重量％以下。

8. 发明授权

US5269855A Permanent magnet alloy having improved resistance 失效
标题翻译：永磁合金具有改善的电阻
公开(公告)号：US5269855A
公开(公告)日：1993-12-14
申请号：US842949
申请日：1992-02-27
申请人： Toshio Ueda , Yuichi Sato , Seiji Isoyama , Seiichi Hisano
发明人： Toshio Ueda , Yuichi Sato , Seiji Isoyama , Seiichi Hisano
IPC分类号： C22C1/04 , H01F1/057 , H01F1/058 , H01F1/053
CPC分类号： C22C1/0441 , H01F1/0572 , H01F1/0577 , H01F1/058
摘要： A permanent magnet made of an R--Fe--B--C or R--Fe--Co--B--C based alloy, where R is at least one rare-earth element, comprising individual magnetic crystal grains that are covered with an oxidation-resistant protective film. The protective film surrounding the individual magnetic crystal grains having a thickness of 0.001-30 .mu.m and 0.05-16 wt. % of the protective film comprising C.
摘要翻译：由R-Fe-B-C或R-Fe-Co-B-C基合金制成的永磁体，其中R为至少一种稀土元素，其包含被抗氧化保护膜覆盖的各个磁性晶粒。围绕各个磁性晶粒的保护膜的厚度为0.001-30μm和0.05-16wt。％的保护膜包括C.

9. 发明授权

US5183630A Process for production of permanent magnet alloy having improved resistence to oxidation 失效
标题翻译：具有改善的耐氧化性的永磁体合金的制造方法
公开(公告)号：US5183630A
公开(公告)日：1993-02-02
申请号：US710800
申请日：1991-06-04
申请人： Toshio Ueda , Yuichi Sato , Masayasu Senda , Seiji Isoyama , Seiichi Hisano
发明人： Toshio Ueda , Yuichi Sato , Masayasu Senda , Seiji Isoyama , Seiichi Hisano
IPC分类号： C22C1/04 , H01F1/057 , H01F1/058
CPC分类号： H01F1/0572 , C22C1/0441 , H01F1/0577 , H01F1/058
摘要： A process for producing a permanent magnet alloy based on a R--Fe--B--C system wherein R is at least one of the rare earth elements including Y, comprising the steps of preparing a molten crude alloy, producing a powder directly therefrom or after casting it into an alloy ingot and then grinding it into the powder, compacting the thus obtained powder and sintering the compacted product, the ingot or powder of the alloy before being sent to the compacting step being subjected to a heat treatment which is carried out at a temperature of 500.degree.-1,100.degree. C. for a period of 0.5 hour or more so as to produce a permanent magnet alloy based on an a R--Fe--B--C system whose individual magnetic crystal grains are covered with an oxidation-resistant protective film which has a C content higher than that of the individual crystal grains.
摘要翻译：一种用于制造基于R-Fe-BC体系的永磁体合金的方法，其中R是包括Y的稀土元素中的至少一种，包括制备熔融粗合金的步骤，直接由其制备粉末或在浇铸之后然后将其研磨成粉末，压实由此获得的粉末，并将压实产品，锭或锭合金烧结，然后送入压实步骤进行热处理，该热处理在温度在500-1100℃下加热0.5小时或更长的时间，以便制备基于R-Fe-BC系统的永磁体合金，其中各个磁性晶粒被抗氧化保护膜覆盖，所述抗氧化保护膜具有 C含量高于单个晶粒的C含量。

10. 发明授权

US5147473A Permanent magnet alloy having improved resistance to oxidation and process for production thereof 失效
标题翻译：具有改善耐氧化性的永磁合金及其生产方法
公开(公告)号：US5147473A
公开(公告)日：1992-09-15
申请号：US565452
申请日：1990-08-09
申请人： Toshio Ueda , Yuichi Sato , Masayasu Senda , Seiji Isoyama , Seiichi Hisano
发明人： Toshio Ueda , Yuichi Sato , Masayasu Senda , Seiji Isoyama , Seiichi Hisano
IPC分类号： C22C1/04 , H01F1/057 , H01F1/058
CPC分类号： C22C1/0441 , H01F1/0572 , H01F1/0577 , H01F1/058
摘要： A permanent magnet made of an R-Fe-B-C or R-Fe-Co-B-C based alloy (where R is at least one rare-earth element) consisting of its individual magnetic crystal grains that are covered with an oxidation-resistant protective film is promising as a practicable next-generation magnet because of its having not only excellent magnetic properties inclusive of magnetic force that surpasses Sm-Co based magnets but also such highly improved oxidation resistance that may withstand use in practical applications for a prolonged time period without being coated on its outermost exposed surface with an oxidation-resistant protective film. Said protective film surrounding the individual magnetic crystal grains contains at least one, preferably substantially all, of the alloying elements of which said magnetic crystal grains are made, with 0.05-16 wt. %, preferably 0.1-16 wt. % of said protective film being composed of C.

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