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公开(公告)号：US20240034892A1
公开(公告)日：2024-02-01
申请号：US18553611
申请日：2022-03-31
发明人： Zhiqiang LI , Mingliang GAO , Yongjiang YU , Hongyu ZHOU , Bin ZHOU , Pengfei WANG , Yunting SU
IPC分类号： C09D7/65 , C09D7/40 , C09D7/63 , C09D7/61 , C09D163/00 , C09D167/00 , C09D133/04
CPC分类号： C09D7/65 , C09D7/70 , C09D7/69 , C09D7/63 , C09D7/61 , C09D163/00 , C09D167/00 , C09D133/04
摘要： Disclosed are a coating composition, a preparation method therefor and use thereof. The coating composition comprises a composition of at least 60% heat-expandable microspheres having a wall thickness of less than or equal to 5 μm, a water-based thermoplastic resin, a water-based thermosetting resin, and a hot-melt filling resin. By means of the coating composition of the present invention, thin-shell spheres can be quickly softened and destroyed within a short time in the heat-expansion process, and with the volatilization of an organic solvent, the coating composition cross-links, on the surface and inside of the coating, with a resin matrix in the coating to form a cross-linked network structure, thus strengthening the gap support of the coating, and enabling the coating to achieve stepped expansion, and after expansion, some polymer materials wrap an airbag and harden to form a stable hollow structure. Therefore, the expanded coating has a stable structure, high thermal shrinkage resistance, high mechanical strength and adhesive force, can be used for the fixation of high temperature-resistant parts, and can maintain adhesive stability when placed in a high-temperature environment (140-180° C.) for a long time.
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公开(公告)号：US20240191049A1
公开(公告)日：2024-06-13
申请号：US18553557
申请日：2022-03-31
发明人： Zhiqiang LI , Mingliang GAO , Yongjiang YU , Hongyu ZHOU , Bin ZHOU , Pengfei WANG , Rui WEI
CPC分类号： C08J9/0085 , C08J9/32 , C08K7/10 , C09D7/61 , C09D7/65 , C09D7/69 , C09D7/70 , C09D133/14 , C08J2203/22 , C08J2333/14 , C08J2475/04 , C08K2201/011
摘要： A composition of heat-expandable microspheres and an application thereof are provided. The composition includes heat-expandable microspheres and a solvent. The particle size of the heat-expandable microspheres is 5 μm≤D≤40 μm, preferably 8 μm≤D≤20 μm. The thickness of the walls of at least 60% of the heat-expandable microspheres is ≤5 μm, preferably the thickness is ≤3 μm. The solvent at least comprises one organic solvent having a boiling point of above 220° C. A thermal expansion coating containing the composition has a stable structure, relatively high resistance to thermal shrinkage, relatively high mechanical strength and adhesion, can be applied in the fixation of high temperature resistant parts, and can maintain the bonding stability thereof when placed long-term in a high temperature environment (140-180° C.).
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公开(公告)号：US20180061568A1
公开(公告)日：2018-03-01
申请号：US15690268
申请日：2017-08-29
发明人： Yongjiang YU , Xiuyan SUN , Nan ZHAO , Xiaodong TIAN
摘要： A method for producing a sintered R-iron (Fe)-boron (B) magnet, the method including: (1) producing a sintered magnet R1-Fe—B-M, where R1 is neodymium (Nd), praseodymium (Pr), terbium (Tb), dysprosium (Dy), gadolinium (Gd), holmium (Ho), or a combination thereof; M is titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), cobalt (Co), nickel (Ni), gallium (Ga), calcium (Ca), copper (Cu), Zinc (Zn), silicon (Si), aluminum (Al), magnesium (Mg), zirconium (Zr), niobium (Nb), hafnium (Hf), tantalum (Ta), tungsten (W), molybdenum (Mo), or a combination thereof; (2) removing oil, washing using an acid solution, activating, and washing using deionized water the sintered magnet, successively; (3) mixing a superfine terbium powder, an organic solvent, and an antioxidant to yield a homogeneous slurry, coating the homogeneous slurry on the surface of the sintered magnet; and (4) sintering and aging the sintered magnet.
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公开(公告)号：US20240013958A1
公开(公告)日：2024-01-11
申请号：US18347840
申请日：2023-07-06
发明人： Yongjiang YU , Cong WANG , Lei LI , Fang JI , Rui WEI
CPC分类号： H01F1/0577 , B22F9/023 , B22F3/162 , H01F41/0293 , B22F9/04 , B22F3/24 , B22F2998/10 , B22F2202/05 , B22F2003/248 , B22F2201/20 , B22F2201/03 , B22F2301/355
摘要： The permanent magnet comprises a main phase structure of R2T14B crystal grains, and R is a rare earth element; T comprises at least Mn, Fe, and optionally a transition metal comprising Co; B is boron; the permanent magnet further comprises Mn and heavy rare earth elements which are distributed in a grain boundary in a diffusion mode. The heavy rare earth element is selected from at least one selected from Dy, Ho and Tb. According to the rare earth permanent magnet prepared through the preparation method, more heavy rare earth elements can be diffused into the magnet core along the grain boundary, Hcj distribution of the permanent magnet is improved, and meanwhile the corrosion resistance and the mechanical property of the permanent magnet are improved.
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5.发明公开公开(公告)号：US20240274332A1
公开(公告)日：2024-08-15
申请号：US18568830
申请日：2022-06-13
发明人： Zhiqiang LI , Yongjiang YU , Bin ZHOU , Yunting SU , Wen LI
CPC分类号： H01F1/0577 , B22F3/24 , C22C38/002 , C22C38/005 , H01F41/0253 , H02K1/02 , B22F2003/242 , B22F2003/247 , B22F2003/248 , B22F2301/355 , B22F2998/10 , B22F2999/00 , H02K15/03
摘要： An expandable sintered neodymium-iron-boron magnet, a preparation method, and an application are provided. The magnet has a sintered neodymium-iron-boron magnet and an expandable coating coated on the surface of the sintered neodymium-iron-boron magnet. The sintered neodymium-iron-boron magnet coated with the expandable coating is used to replace a conventional assembly method of an epoxy resin adhesive coating magnet and potting resin glue, so that the magnet coated with the expandable coating may be inserted into a magnetic steel groove. The irreversible expansion of the coating itself is used to fix the magnet in the magnetic steel groove. Meanwhile, the use of the expandable coating shortens the assembly time of motors and improves the assembly accuracy of the motors.
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公开(公告)号：US20240194380A1
公开(公告)日：2024-06-13
申请号：US18536724
申请日：2023-12-12
发明人： Yongjiang YU , Meng LI , Yunying JIANG , Lei LIU , Tao REN
IPC分类号： H01F1/057 , B22F1/16 , B22F3/16 , B22F3/24 , B22F9/02 , B22F9/04 , C22C33/04 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16
CPC分类号： H01F1/0577 , B22F1/16 , B22F3/16 , B22F3/24 , B22F9/023 , B22F9/04 , C22C33/04 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , B22F2003/242 , B22F2003/248 , B22F2009/044 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2302/25 , B22F2302/253 , B22F2998/10 , B22F2999/00 , C22C2202/02
摘要： An R-T-B based permanent magnet material, a preparation method therefor and use thereof are provided. The R-T-B permanent magnet material forms M oxides at the grain boundary triple point, such that oxygen is enriched at the grain boundary triple point, thereby accurately controlling the oxygen content in the magnet. The permanent magnet material and the preparation method of the present disclosure can prepare products with strong corrosion resistance under the condition of unchanged magnetic properties, and improve the formability in the pressing process, thereby improving the qualified rate of the products.
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公开(公告)号：US20140352847A1
公开(公告)日：2014-12-04
申请号：US14187190
申请日：2014-02-21
发明人： Yongjiang YU , Xiuyan SUN , Zhiqiang LI , Yulin WANG , Lei LIU
CPC分类号： B22F3/26 , B22F2998/10 , B22F2999/00 , C22C33/0278 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , C22C2202/02 , H01F1/0577 , H01F41/0293 , B22F3/10 , B22F2201/20 , B22F2003/242 , B22F2003/248
摘要： A method for preparing an R—Fe—B based sintered magnet, including: preparing a R1—Fe—B-M sintered magnet having a thickness of between 1 and 10 mm; spraying a layer of Tb or Dy having a thickness of between 10 and 200 μm on each surface of the sintered magnet in a sealed box under an Ar atmosphere by hot spraying method; and transferring the sintered magnet coated with the layer of Tb or Dy to a vacuum sintering furnace, heating the sintered magnet at the temperature of between 750 and 1000° C. in a vacuum condition or under the Ar atmosphere, and allowing heavy rare earth element Tb or Dy to enter an inner part of the sintered magnet via grain boundary diffusion.
摘要翻译： 一种制备R-Fe-B系烧结磁体的方法，包括：制备厚度在1至10mm之间的R1-Fe-B-M烧结磁体; 通过热喷涂法在Ar气氛下的密封箱中在烧结磁体的每个表面上喷涂厚度为10-200μm的Tb或Dy层; 将涂布有Tb或Dy层的烧结磁体转移到真空烧结炉中，在真空条件下或Ar气氛下，在750〜1000℃的温度下对烧结磁体进行加热，使重稀土元素 Tb或Dy通过晶界扩散进入烧结磁体的内部。
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