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1.发明公开公开(公告)号：US20240212899A1
公开(公告)日：2024-06-27
申请号：US18486470
申请日：2023-10-13
发明人： Haijun PENG , Yang LUO , Zilong WANG , Shengjie ZHU , Dunbo YU , Hongbin ZHANG , Weikang SHAN , Tianjiao MA , Shuai CUI
CPC分类号： H01F1/059 , B22F1/05 , B22F1/065 , B22F1/142 , B22F1/145 , B22F9/22 , C22C33/0235 , C22C38/001 , C22C38/005 , B22F2201/016 , B22F2201/02 , B22F2201/20 , B22F2301/355 , B22F2304/10 , B22F2998/10 , B22F2999/00 , C22C2202/02
摘要： Disclosed are anisotropic samarium-iron-nitrogen magnetic alloy powder and a preparation method therefor. The anisotropic samarium-iron-nitrogen magnetic alloy powder has a chemical formula of Sm2Fe17N3, and has a Th2Zn17 crystal structure. In the alloy powder, the granularity is: D90≤5 μm and D10≥0.5 μm, the average sphericity ≥0.7, the coercivity Hcj≥10 kOe, and the square degree Q≥0.5. The preparation method includes: S1: mixing iron powder, samarium oxide powder and calcium granules uniformly; S2: placing the mixture into a rotating heat treatment furnace, adding high-temperature-resistant balls, performing vacuumizing, introducing a reductive diffusion protective gas, and heating a furnace body; S3: cooling the furnace body, performing vacuumizing, and introducing a nitriding gas; and S4: taking out and separating the cooled powder and balls, washing the powder, and drying the powder in a vacuum environment to obtain the anisotropic samarium-iron-nitrogen magnetic alloy powder.
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公开(公告)号：US20240212898A1
公开(公告)日：2024-06-27
申请号：US18486440
申请日：2023-10-13
发明人： Yang LUO , Ze ZHANG , Zilong WANG , Yuanfei YANG , Wenlong YAN , Dunbo YU , Tianhao LI , Wenjian YAN , Tengfei HU
CPC分类号： H01F1/0578 , H01F1/0558 , H01F41/0266 , H01F41/028 , H02K15/03
摘要： Disclosed are a gradient ring-shaped bonded magnet and a preparation method therefor, and a motor. The gradient ring-shaped bonded magnet includes: a magnet body and at least one reinforcement layer. The magnet body is a ring-shaped cylinder; the reinforcement layer is in pressing fit with a surface of the magnet body; a material of the magnet body is a first permanent magnet, and a material of the reinforcement layer is a second permanent magnet; and the coercivity property, the remanence property and/or the maximum working temperature of the second permanent magnet are/is higher than those of the first permanent magnet.
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公开(公告)号：US20210407713A1
公开(公告)日：2021-12-30
申请号：US17331555
申请日：2021-05-26
发明人： Yang LUO , Wei ZHU , Dunbo YU , Zilong WANG , Hongbin ZHANG , Xinyuan BAI , Xiao LIN , Haijun PENG , Jiajun XIE
摘要： The present invention relates to a modified sintered Nd—Fe—B magnet, and a preparation method and a use thereof. The modified sintered Nd—Fe—B magnet is prepared by performing grain boundary diffusion on a matrix, wherein the matrix is a sintered Nd—Fe—B magnet; a grain boundary diffusion source for the grain boundary diffusion consists of a first diffusion source and a second diffusion source; the first diffusion source is a PrMx alloy, M being at least one selected from a group consisted of Cu, Al, Zn, Mg, Ga, Sn, Ag, Pb, Bi, Ni, Nb, Mn, Co, Fe, Ti, Cr, Zr, Mo and Ge; and the second diffusion source is heavy rare earth Dy and/or Tb. A wider and longer diffusion channel formed by a low-melting-point alloy containing Pr preferentially entering the inside of the magnet is used as a channel for rapid diffusion of a heavy rare earth element
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公开(公告)号：US20210375514A1
公开(公告)日：2021-12-02
申请号：US17331531
申请日：2021-05-26
发明人： Yang LUO , Yuanfei YANG , Zilong WANG , Dunbo YU , Hongbin ZHANG , Jiajun XIE , Zhou HU , Zhongkai WANG
摘要： An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.
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公开(公告)号：US20240360330A1
公开(公告)日：2024-10-31
申请号：US18624935
申请日：2024-04-02
发明人： Xiaojun SUN , Yang LUO , Zilong WANG , Dunbo YU , Jiyuan GUO , Jiping DUAN , Yan WANG , Yuanfei YANG , Hongbin ZHANG , Kaiwen WU
IPC分类号： C09D11/037 , C09D11/033 , C09D11/104 , C09D11/107 , C09D11/14
CPC分类号： C09D11/037 , C09D11/033 , C09D11/104 , C09D11/107 , C09D11/14
摘要： Disclosed are an organic slurry with a gradient volatilization rate and a preparation method. The organic slurry includes a rare earth powder, an organic solvent, a resin, a dispersant, and/or an anti-settling agent, and/or a synergist, weight percentages of which are as follows: rare earth powder 50%-90%; organic solvent 8%-50%; resin 0.4%-6%; dispersant 0%-5%; anti-settling agent 0%-3%; and synergist 0%-3%. The preparation method includes: weighing the rare earth powder, organic solvent, resin, dispersant, and/or anti-settling agent, and/or synergist by weight percentage; sequentially adding the weighed ingredients into a mixer, stirring at a constant temperature, and then cooling to room temperature to obtain an organic carrier; adding the organic carrier and the weighed rare earth powder into a vacuum high-speed disperser to obtain a crude organic slurry; and transferring the crude organic slurry to a gap adjustable three-roll grinder for grinding to obtain a fine organic slurry.
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公开(公告)号：US20210375512A1
公开(公告)日：2021-12-02
申请号：US17331544
申请日：2021-05-26
发明人： Yang LUO , Yuanfei YANG , Zilong WANG , Dunbo YU , Jiajun XIE , Kaiwen WU , Yifan LIAO , Jichen JIA
摘要： An anisotropic bonded magnet and a preparation method thereof are provided. Through a method of stacking magnets which are different in content of SmFeN and/or have different densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method avoids the phenomenon of non-uniform magnetic field orientation and density in a height direction during orientation and densification as well as the phenomenon of low in the middle and high at two ends.
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公开(公告)号：US20240360329A1
公开(公告)日：2024-10-31
申请号：US18621650
申请日：2024-03-29
发明人： Xiaojun SUN , Yang LUO , Zilong WANG , Yan WANG , Jiping DUAN , Yuanfei YANG , Hongbin ZHANG , Kaiwen WU , Dunbo YU
IPC分类号： C09D11/037
CPC分类号： C09D11/037
摘要： Disclosed are an organic slurry for neodymium iron boron screen printing and a preparation method. The organic slurry includes a rare earth powder, an organic solvent, a resin, a dispersant, and/or a leveling agent, weight percentages of which are as follows: rare earth powder 50%-90%; organic solvent 8%-50%; resin 0.4%-6%; dispersant 0%-5%; and leveling agent 0%-3%. The preparation method includes: sequentially adding the weighed organic solvent, resin, dispersant, and/or leveling agent into a mixer, stirring at a constant temperature, and then cooling to room temperature to obtain an organic carrier; adding the organic carrier and the weighed rare earth powder into a vacuum high-speed disperser, and dispersing at a high speed to obtain a crude organic slurry; and transferring the crude organic slurry to a gap adjustable three-roll grinder, and grinding to obtain a fine organic slurry.
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公开(公告)号：US20210129217A1
公开(公告)日：2021-05-06
申请号：US17090703
申请日：2020-11-05
发明人： Yang LUO , Zilong WANG , Yuanfei Yang , Zhou HU , Dunbo Yu , Jiajun XIE , Yifan LIAO , Zhongkai WANG
摘要： A method for preparing a rare earth anisotropic bonded magnetic powder, comprises the following steps: (1) preparing raw powder with RTBH as the main component, wherein, R is Nd or Pr/Nd, and T is a transition metal containing Fe; (2) adding La/Ce hydride and copper powder to the raw powder to form a mixture; (3) subjecting the mixture to atmosphere diffusion heat treatment to give the rare earth anisotropic bonded magnetic powder. The invention selects high-abundance rare earth elements La, Ce to replace Dy, Tb, Nd, Pr and other medium and heavy rare earth elements, which can achieve the same coercivity improvement effect while also significantly reducing the cost, thereby achieving efficient application of low-cost and high-abundance rare earths.
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公开(公告)号：US20200263280A1
公开(公告)日：2020-08-20
申请号：US16791088
申请日：2020-02-14
发明人： Yang LUO , Xiao LIN , Guiyong WU , Jiajun XIE , Zilong WANG , Wenlong YAN , Zhongkai WANG , Dunbo YU
摘要： The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05≤x≤0.4, 7≤a≤13, 0≤b≤3, 5≤c≤20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.
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公开(公告)号：US20210343459A1
公开(公告)日：2021-11-04
申请号：US17244880
申请日：2021-04-29
申请人： GRIREM ADVANCED MATERIALS CO.,LTD. , Rare Earth Functional Materials (Xiong 'an) Innovation Center Co., Ltd. , Grirem (Rongcheng) Co., Ltd.
发明人： Yang LUO , Dunbo YU , Wei ZHU , Xinyuan BAI , Xiao LIN , Shengjie ZHU , Zilong WANG , Haijun PENG
摘要： The present invention relates to an R-T-B sintered magnet and a preparation method thereof. The sintered magnet includes a grain boundary region T1, a shell layer region T2 and an R2Fe14B grain region T3; at 10 μm to 60 μm from a surface of the sintered magnet toward a center thereof, an area ratio of the shell layer region T2 to the R2Fe14B grain region T3 is 0.1 to 0.3, and a thickness of the shell layer region T2 is 0.5 μm to 1.2 μm; and an average coating percent of the shell layer region T2 on the R2Fe14B grain region T3 is 80% or more. In the present invention, by optimizing a preparation process and a microstructure of a traditional rare earth permanent magnet, diffusion efficiency of heavy rare earth in the magnet is improved, such that coercivity of the magnet is greatly improved, and manufacturing cost is reduced.
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