专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20220189669A1 ANISOTROPIC MAGNETIC POWDER, ANISOTROPIC MAGNET AND METHOD FOR MANUFACTURING ANISOTROPIC MAGNETIC POWDER 有权
公开(公告)号：US20220189669A1
公开(公告)日：2022-06-16
申请号：US17593090
申请日：2020-01-10
申请人： TDK CORPORATION , NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
发明人： Suguru SATOH , Yasushi ENOKIDO , Shusuke OKADA , Kenta TAKAGI
IPC分类号： H01F1/059 , H01F41/02 , C23C8/26 , C22C1/04 , C22C28/00 , C22C32/00 , C30B29/52
摘要： One embodiment of the present invention includes single-crystal particles of a TbCu7 type samarium-iron-nitrogen based alloy in an anisotropic magnet powder.

2. 发明申请

US20220293310A1 RARE-EARTH-BASED MAGNET POWDER, BONDED MAGNET, BONDED MAGNET COMPOUND, SINTERED MAGNET, METHOD OF MANUFACTURING RARE-EARTH-BASED MAGNET POWDER, AND METHOD OF MANUFACTURING RARE-EARTH BASED PERMANENT MAGNET 有权
公开(公告)号：US20220293310A1
公开(公告)日：2022-09-15
申请号：US17695011
申请日：2022-03-15
申请人： TDK CORPORATION
发明人： Ikuya KOKAWA , Yoshinori FUJIKAWA , Kenichi SUZUKI , Yasushi ENOKIDO
IPC分类号： H01F1/055 , H01F41/02 , H01F7/02
摘要： The rare-earth-based magnet powder has an average value of 0.65 or more as sphericity P1 defined by an equation (1) of P1=Ls/Ll. In the equation (1), Ll is a length or a long side of a rectangle that circumscribes the rare-earth-based magnet powder in a photomicrograph so that an area of the rectangle is minimized, and Ls is a length of a short side of the rectangle that circumscribes the rare-earth-based magnet powder in the photomicrograph so that the area of the rectangle is minimized.

3. 发明申请

US20140311287A1 R-T-B BASED SINTERED MAGNET 有权
标题翻译：基于R-T-B的烧结磁体
公开(公告)号：US20140311287A1
公开(公告)日：2014-10-23
申请号：US14254220
申请日：2014-04-16
申请人： TDK CORPORATION
发明人： Yasushi ENOKIDO , Kyung-Ku CHOI , Ryuji HASHIMOTO , Daisuke TANAKA
IPC分类号： H01F1/053
CPC分类号： H01F1/0536 , H01F1/0577
摘要： The present invention provides a permanent magnet with excellent temperature characteristics and without magnetic properties significantly decreased compared to the existing R-T-B based magnet. By means that the R-T-B based magnet as the raw material is applied to heating treatment for a long time, the main phase grains will turn into core-shell like, and said R-T-B based magnet comprises main phase grains having core portion and shell portion that covers the core. When the mass concentration of RI and Y in the core portion is set as αR1 and αY respectively and the mass concentration of R1 and Y in the shell portion is set as βR1 and βY respectively, the ratio (B/A) between the mass concentration ratio of R1 to Y in the shell portion (βR1/βY=B) and the mass concentration ratio of R1 to Y in the core portion (αR1/αY=A) is 1.1 or more. Thus, the decrease of coercivity caused by Y addition is prevented, and the increase effect of temperature characteristics caused by addition of Y will lead to improve the magnetic properties under high temperature.
摘要翻译：本发明提供一种与现有的R-T-B基磁体相比，具有优异的温度特性和不具有磁性能的永磁体。通过将作为原料的RTB型磁体长时间地应用于加热处理，主相晶粒将变成芯 - 壳状，并且所述RTB基磁体包括具有芯部的主相晶粒和覆盖的芯部分核心。核心部分的RI和Y的质量浓度分别设定为αR1和αY，并且壳部分中的R1和Y的质量浓度分别设置为＆Bgr; R1和＆bgr; Y，比率（B / A）在壳部分中的R1与Y的质量浓度比（＆Bgr; R1 /＆bgr; Y = B）和芯部中的R1与Y的质量浓度比（αR1/αY= A）之间为1.1以上。因此，防止由Y添加引起的矫顽力的降低，并且由于添加Y引起的温度特性的增加效果将导致在高温下提高磁性能。

4. 发明申请

US20150294773A1 MAGNET POWDER, BOND MAGNET AND MOTOR 有权
标题翻译：磁铁粉，磁铁和电机
公开(公告)号：US20150294773A1
公开(公告)日：2015-10-15
申请号：US14678284
申请日：2015-04-03
申请人： TDK CORPORATION
发明人： Daisuke TANAKA , Yasushi ENOKIDO
IPC分类号： H01F1/057 , H02K1/02 , H01F1/08
CPC分类号： H01F1/0578
摘要： A magnet powder having a composition composed of R (R consists of R1 and R2, R1 represents at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm, Yb and Lu, R2 represents at least one rare earth element selected from the group consisting of Ho and Gd). T (T represents at least one transition metal element containing Fe or the combination of Fe and Co as essential element(s)) and B, wherein, the atomic ratio of R2/(R1×R2) is 0.05 to 0.1, the ratio of R/T is 0.25 to 0.35, and the magnet powder has an average primary particle size of 45 to 100 nm. The present invention also provides a bond magnet using the magnet powder.
摘要翻译：具有由R（R由R 1和R 2组成）的组成的磁铁粉末，R1表示选自Y，La，Ce，Pr，Nd，Sm，Eu，Tb，Dy，Er中的至少一种稀土元素，Tm，Yb和Lu，R2表示选自Ho和Gd中的至少一种稀土元素）。 T（T表示至少一种含有Fe或Fe和Co作为必需元素的组合的过渡金属元素）和B，其中R2 /（R1×R2）的原子比为0.05〜0.1， R / T为0.25〜0.35，磁铁粉末的平均一次粒径为45〜100nm。本发明还提供一种使用该磁体粉末的粘结磁体。

5. 发明申请

US20150303744A1 R-T-B BASED PERMANENT MAGNET AND ROTATING MACHINE 有权
标题翻译： R-T-B型永久磁铁和旋转机
公开(公告)号：US20150303744A1
公开(公告)日：2015-10-22
申请号：US14689862
申请日：2015-04-17
申请人： TDK CORPORATION
发明人： Ryuji HASHIMOTO , Yasushi ENOKIDO , Kenichi NISHIKAWA
IPC分类号： H02K1/02 , H01F1/34
CPC分类号： H01F1/34 , C22C33/0278 , C22C38/005 , C22C2202/02 , H01F1/0577
摘要： The present invention provides an R-T-B based permanent magnet suitable as a magnet with a variable magnetic force for a motor with variable magnetic flux, which has a high residual magnetic flux density, a low coercivity, and a magnetic force that can be reversibly varied by a small external magnetic field. A permanent magnet with a high residual magnetic flux density and a low coercivity that is suitable as a variable magnet for a motor with variable magnetic flux can be obtained, by selecting the rare earth elements consisting of one or more of Y, La and Ce for a predetermined amount of the rare earth element(s) R in the R-T-B based permanent magnet, and further adding a predetermined amount of the additive element(s) which is at least one of Al, Cu, Zr, Hf and Ti.
摘要翻译：本发明提供一种适用于具有可变磁力的可变磁力的基于RTB的永磁体，其具有可变磁通量的电动机，其具有高的剩余磁通密度，低的矫顽力和可以由小外磁场。通过选择由Y，La和Ce中的一种或多种组成的稀土元素，可以获得具有高残留磁通密度和低矫顽力的永磁体，其适用于具有可变磁通量的电动机的可变磁体，用于在RTB永磁体中预定量的稀土元素R，并且进一步添加预定量的作为Al，Cu，Zr，Hf和Ti中的至少一种的添加元素。

6. 发明申请

US20140311288A1 R-T-B BASED SINTERED MAGNET 审中-公开
标题翻译：基于R-T-B的烧结磁体
公开(公告)号：US20140311288A1
公开(公告)日：2014-10-23
申请号：US14258375
申请日：2014-04-22
申请人： TDK CORPORATION
发明人： Yasushi ENOKIDO , Akihiro OHSAWA
IPC分类号： H01F1/053
CPC分类号： H01F1/0536 , H01F1/0577
摘要： The present invention provides a permanent magnet with both a high corrosion resistance and magnetic properties compared to the existing R-T-B based magnets. It is a R-T-B based sintered magnet (wherein, R includes Y (yttrium) and R1 as essential, R1 is at least one kind of rare earth elements except Y but includes Nd as essential, and T is at least one kind of transition metal element including Fe or the combination of Fe and Co as essential). By allowing the ratio of R1 to Y (R1:Y) in the R contained in the grain boundary phase to be 80:20˜35:65 in terms of the calculated molar ratio of the grain boundary phase and adding Y to the raw materials of the R-T-B based magnet, Y segregates at the triple point, and corrosion of grain boundary phase is prevented by oxidized Y.
摘要翻译：本发明提供一种与现有的R-T-B基磁体相比具有高耐腐蚀性和磁特性的永磁体。它是一种RTB型烧结磁体（其中，R包括Y（钇）和R1为必需的，R1为除了Y以外的至少一种稀土元素，但包括Nd为必需的，T为至少一种过渡金属元素包括Fe或Fe和Co的组合是必需的）。通过使所计算的晶界相的摩尔比和原料添加Y，使晶界相中所含的R 1与R 1〜Y（R 1：Y）的比率为80:20〜35:65 的RTB型磁体，Y在三重点分离，通过氧化Y阻止晶界相的腐蚀。

7. 发明申请

US20150302959A1 R-T-B BASED PERMANENT MAGNET AND RAW ALLOY FOR THE SAME 有权
标题翻译：基于R-T-B的永磁体和原始合金
公开(公告)号：US20150302959A1
公开(公告)日：2015-10-22
申请号：US14686200
申请日：2015-04-14
申请人： TDK CORPORATION
发明人： Ryuji HASHIMOTO , Yasushi ENOKIDO , Hironori WADA
IPC分类号： H01F1/057 , C22C38/00
CPC分类号： C22C38/002 , B22F2998/10 , C22C38/005 , H01F1/0577 , B22F9/023 , B22F9/04 , B22F2009/043 , B22F3/02 , B22F3/10
摘要： In the present invention, a permanent magnet with excellent temperature properties and magnetic properties which will not significantly deteriorate can be stably prepared, by using a raw alloy for the R-T-B based permanent magnet in which the rare earth element(s) composed of at least one selected from the group consisting of Y, La and Ce is selected as a predetermined amount of the rare earth element R in the R-T-B based permanent magnet and a proper amount of Ca is contained.
摘要翻译：在本发明中，通过使用用于RTB型永久磁铁的原料合金，可以稳定地制备出不会显着劣化的具有优异的温度特性和磁特性的永久磁铁，其中稀土元素由至少一个选自Y，La和Ce组中的一种，作为RTB永磁体中的稀土元素R的预定量，并且含有适量的Ca。

8. 发明申请

US20150294770A1 PERMANENT MAGNET AND MOTOR 有权
标题翻译：永久磁铁和电机
公开(公告)号：US20150294770A1
公开(公告)日：2015-10-15
申请号：US14678288
申请日：2015-04-03
申请人： TDK CORPORATION
发明人： Daisuke TANAKA , Yasushi ENOKIDO
IPC分类号： H01F1/055 , C22C30/02 , H02K1/02 , C22C28/00
CPC分类号： H02K1/02 , C22C28/00 , C22C30/02 , C22C33/0278 , C22C38/002 , C22C38/005 , C22C2202/02 , H01F1/0577
摘要： The present invention provides an R-T-B based permanent magnet, comprising: a main phase which is composed of the structure of R2T14B (R is at least one element selected from Y, La, Ce, Pr, Nd, Sm, Eu and Gd, and T is one or more transition metal elements having Fe or a combination of Fe and Co as necessary); and a grain boundary phase which is composed of CexM1-x (M is at least one element selected from Mg, Al, Si, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Y, Zr, Nb, Mo, Ag, In, Sn, La, Pr, Nd, Sm, Eu, Gd, Hf, Ta, W and Bi, and x is within the range of 0.20≦x≦0.55), and the cross-sectional ratio Atre of the grain boundary phase to the whole magnet structure is within the range of 0.03
摘要翻译：本发明提供了一种基于RTB的永磁体，其特征在于，包括：主相，其由R2T14B（R为选自Y，La，Ce，Pr，Nd，Sm，Eu和Gd中的至少一种元素，T，是一种或多种具有Fe的Fe或Fe和Co的组合的过渡金属元素; 和由CexM1-x组成的晶界相（M为选自Mg，Al，Si，Ti，Cr，Mn，Fe，Co，Ni，Cu，Zn，Ga，Y，Zr，Nb中的至少一种元素），Mo，Ag，In，Sn，La，Pr，Nd，Sm，Eu，Gd，Hf，Ta，W和Bi中的至少一个，x在0.20≤n1E的范围内; x＆nlE; 0.55）对于整个磁体结构的晶界相，在0.03

9. 发明申请

US20150279526A1 R-T-B BASED PERMANENT MAGNET 审中-公开
标题翻译： R-T-B基永久磁铁
公开(公告)号：US20150279526A1
公开(公告)日：2015-10-01
申请号：US14666831
申请日：2015-03-24
申请人： TDK CORPORATION
发明人： Yasushi ENOKIDO , Kenichi SUZUKI
IPC分类号： H01F1/01 , H02K1/02
CPC分类号： H01F1/01 , H01F1/0577 , H02K1/02
摘要： The present invention provides a R-T-B based permanent magnet, comprising a demagnetization curve having a slope ΔJ/Δ(H/HcJ) of less than 400 kG at a region where the value of magnetic field is Hk or less, wherein it is preferable that R in the composition of R-T-B is represented by (R11-xR2x), and T represents one or more transition metal elements containing Fe or a combination of Fe and Co as necessary, where: R1 represents the rare earth element(s) composed of one or more elements selected from the group consisting of Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and R2 contains at least one element selected from the group consisting of Y, Ce and La, and 0.2≦x≦0.7.
摘要翻译：本发明提供了一种基于RTB的永磁体，其包括在磁场值为Hk或更小的区域处具有小于400kG的斜率＆Dgr; J /＆Dgr;（H / HcJ）的退磁曲线，其中，优选RTB的组成中的R表示为（R11-xR2x），T表示一种或多种含有Fe或Fe和Co的组合的过渡金属元素，其中：R1表示构成的稀土元素选自由Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb和Lu组成的组中的一种或多种元素，R2包含至少一种选自Y， Ce和La，和0.2＆amp; NlE; x＆nlE; 0.7。

10. 发明申请

US20140311289A1 R-T-B BASED SINTERED MAGNET 审中-公开
标题翻译：基于R-T-B的烧结磁体
公开(公告)号：US20140311289A1
公开(公告)日：2014-10-23
申请号：US14258450
申请日：2014-04-22
申请人： TDK CORPORATION
发明人： Yasushi ENOKIDO , Akihiro OHSAWA
IPC分类号： H01F1/053
CPC分类号： H01F1/0536 , H01F1/0577
摘要： The present invention provides a permanent magnet with both a high corrosion resistance and magnetic properties compared to the existing R-T-B based magnets. It is a R-T-B based sintered magnet (wherein, R includes Y (yttrium) and R1 as essential, R1 is at least one kind of rare earth elements except Y but includes Nd as e essential, and T is one or more kinds of transition metal elements including Fe or the combination of Fe and Co as essential). By allowing the ratio of R1 to Y (R1:Y) in the R to be 80:20˜35:65 according to the molar ratio of the sintered magnet composition, Y segregates at the triple point, and corrosion of grain boundary phase is prevented by oxidizing it.
摘要翻译：本发明提供一种与现有的R-T-B基磁体相比具有高耐腐蚀性和磁特性的永磁体。它是一种RTB型烧结磁体（其中，R包括Y（钇）和R1作为必需的，R1是除Y以外的至少一种稀土元素，但包括Nd为必需的，T为一种或多种过渡金属元素包括Fe或Fe和Co的组合是必需的）。通过根据烧结磁体组成的摩尔比使R中的R 1与Y（R 1：Y）的比率为80:20〜35:65，Y在三相上分离，晶界相腐蚀为通过氧化来防止它。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式