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公开(公告)号：US11705257B2
公开(公告)日：2023-07-18
申请号：US17244880
申请日：2021-04-29
Applicant: GRIREM ADVANCED MATERIALS CO., LTD. , Rare Earth Functional Materials (Xiong 'an) Innovation Center Co., Ltd , Grirem (Rongcheng) Co., Ltd.
Inventor： Yang Luo , Dunbo Yu , Wei Zhu , Xinyuan Bai , Xiao Lin , Shengjie Zhu , Zilong Wang , Haijun Peng
IPC: H01F1/057 , H01F41/02 , B22F3/24 , H01F1/22 , H01F7/02 , C22C38/00 , C22C38/14 , C22C38/06 , C22C38/16 , C22C38/10
CPC classification number: H01F1/22 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F7/02
Abstract: 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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公开(公告)号：US11680203B2
公开(公告)日：2023-06-20
申请号：US16612299
申请日：2017-10-18
Applicant: GRIREM ADVANCED MATERIALS CO., LTD.
Inventor： Ronghui Liu , Guantong Chen , Yuanhong Liu , Xiaole Ma
CPC classification number: C09K11/677 , C09K11/025 , H01L33/502
Abstract: The present invention relates to a red phosphor, a preparation method thereof and a light-emitting device prepared therefrom. A particle of the red phosphor consists of a phosphor inner core having a chemical formula of Ax1Gez1F6:y1Mn4+ and an outer shell having a chemical formula of Bx2Mz2F6:y2Mn4+, wherein 1.596≤x1≤2.2, 1.6≤x2≤2.2, 0.001≤y1≤0.2, 0≤y2≤0.2, 0.9≤z1≤1.1, and 0.9≤z2≤1.1; A and B are independently selected from alkali metal elements; and M is Si, or Si and Ge. The red phosphor provided by the present invention has high luminous efficiency and stability. Moreover, the phosphor alone or in combination with other luminescent materials can be used for preparing a light-emitting device with high performance.
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公开(公告)号：US20220411694A1
公开(公告)日：2022-12-29
申请号：US17748789
申请日：2022-05-19
Applicant: GRIREM ADVANCED MATERIALS CO., LTD. , Grirem Hi-Tech Co., Ltd. , Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd.
Inventor： Ronghui LIU , Shaowei QIN , Yuanhong LIU , Yanfeng LI , Xiaoxia CHEN , Xiaole MA , Yuan XUE
Abstract: The invention relates to a phosphor with garnet structure and a light-emitting device comprising the phosphor, wherein the phosphor includes the following components in percentage by weight: 38.47-45.19% of Y element, 9.49-22.09% of Al element, 2.06-24.31% of Ga element, 27.3-32.04% of O element, 0.43-1.46% of Ce element. In the phosphor particles, the shortest distance from the surface of one side of the particle to the surface of the opposite side through the centroid of the particle is defined as R, the longest distance is R1, and 5 μm≤R≤40 μm; any distance from the particle surface to the centroid is r, and 0
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公开(公告)号：US20220259496A1
公开(公告)日：2022-08-18
申请号：US17441920
申请日：2020-10-30
Applicant: GRIREM ADVANCED MATERIALS CO., LTD. , GRIREM HI-TECH CO., LTD. , Rare Earth Functional Materials (Xiong 'an) Innovation Co., Ltd.
Inventor： Jinqiu YU , Liang LUO , Chengpeng DIAO , Lei CUI , Hao WU , Huaqiang HE
Abstract: A rare earth halide scintillation material the chemical formula of the material being CeBr3+x, wherein 0.0001x0.1. The rare earth halide scintillation material has excellent scintillation properties including high light output, high energy resolution, and fast decay.
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公开(公告)号：US20220173281A1
公开(公告)日：2022-06-02
申请号：US17254226
申请日：2019-08-22
Applicant: GRIREM ADVANCED MATERIALS CO., LTD
Inventor： Ronghui LIU , Yuanhong LIU , Yanfeng LI , Xiaoxia CHEN , Xiaole MA , Yuan XUE
Abstract: An optical device includes an LED chip, a light absorber and/or visible-light luminescent material, and a near-infrared luminescent material, wherein a luminous power of light emitted by the near-infrared luminescent material and the light absorber and/or visible-light luminescent material in a band of 650-1000 nm under the excitation of the LED chip is A, and a sum of a luminous power of light emitted by the near-infrared and visible-light luminescent materials in a band of 350-650 nm under the excitation of the LED chip and a luminous power of residual light emitted by the LED chip in the band of 350-650 nm after the LED chip excites the near-infrared and visible-light luminescent materials is B, with B/A*100% being 0.1%-10%. According to the implementation where the optical device employs the LED chip to combine the near-infrared luminescent material and the light absorber and/or visible-light luminescent material simultaneously.
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Patent Agency Ranking
公开(公告)号：US11299672B2
公开(公告)日：2022-04-12
申请号：US16612315
申请日：2018-09-13
Inventor： Ronghui Liu , Xiaoxia Chen , Yuanhong Liu , Yanfeng Li , Xiaole Ma
Abstract: The near-infrared luminescent material is capable of efficiently emitting near-infrared light with a peak wavelength of 900 nm to 1,100 nm under an effective excitation wavelength of 250 nm to 750 nm. The luminescent material has the characteristics of wide excitation emission wavelength, high luminous efficiency, uniform luminescence, no impurity phase, high stability, simple preparation and the like. The present invention further provides the light-emitting device prepared from the near-infrared luminescent material. The luminescent material and the light-emitting device provided by the present invention solve the problems of poor stability, low luminous efficiency, high preparation cost and the like of a conventional near-infrared luminescent material and light-emitting device, and have a favorable application prospect.
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公开(公告)号：US20210403808A1
公开(公告)日：2021-12-30
申请号：US16469114
申请日：2018-09-29
Inventor： Ronghui LIU , LIU LIU , Xia ZHANG , Wei GAO , Xiaole MA , Huibing XU
Abstract: The present disclosure relates to the technical field of luminescent materials, and more particularly, to a nitride luminescent material and a light emitting device comprising the luminescent material. The nitride luminescent material recited in the present disclosure includes an inorganic compound with the structural composition RwQxSiyNz, the excitation wavelength of the luminescent material is between 300-650 nm, and the emission main peak of the NIR light region is broadband emission between 900-1100 nm; the excitation wavelength of the luminescent material is relatively broad and capable of excellent absorption of ultraviolet visible light, and has more intensive NIR emission as compared with NIR organic luminescent materials and inorganic luminescent materials of other systems, so it is an ideal application material for NIR devices.
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公开(公告)号：US11101057B2
公开(公告)日：2021-08-24
申请号：US15868063
申请日：2018-01-11
Applicant: GRIREM ADVANCED MATERIALS CO., LTD.
Inventor： Guiyong Wu , Yang Luo , Hongwei Li , Yuanfei Yang , Dunbo Yu , Ningtao Quan , Chao Yuan , Wenlong Yan
IPC: C22C38/00 , H01F1/059 , C23C8/24 , H01F1/08 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/28 , C23C8/26 , H01F41/02 , C22C33/02 , B22F9/04 , B22F9/08 , B22F3/02 , B22F5/00 , B22F1/00
Abstract: Provided are a highly thermostable rare-earth permanent magnetic material, a preparation method thereof and a magnet containing the same. A composition of the rare-earth permanent magnetic material by an atomic percentage is as follows: SmxRaFe100-x-y-z-aMyNz, wherein R is at least one of Zr and Hf, M is at least one of Co, Ti, Nb, Cr, V, Mo, Si, Ga, Ni, Mn and Al, x+a is 7-10%, a is 0-1.5%, y is 0-5% and z is 10-14%.
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公开(公告)号：US20210156009A1
公开(公告)日：2021-05-27
申请号：US16612290
申请日：2018-06-20
Inventor： YANG LUO , DUNBO YU , JIAJUN XIE , CAOHUAN ZHANG , NINGTAO QUAN , YUANFEI YANG , HAIJUN PENG
Abstract: The present invention discloses an yttrium-added rare earth permanent magnet material and a preparation method therefor. The chemical formula of the material is expressed as (YxRe1-x)aFe100-a-b-cMbBc according to the mass percentage, wherein 0.05≤x≤0.5, 20≤a≤28, 0.5≤b≤2, 0.5≤c≤1.5, Re is Nd and/or Pr, and M is Al and/or Nb. According to the present invention, the relatively surplus and inexpensive rare earths yttrium and cerium are used to replace Nd and/or Pr in NdFeB. By controlling the ratio of the rare earth elements such as yttrium, cerium and neodymium, and adding an appropriate amount of Nb and/or Al element, the rare earth elements are used in a comprehensive and balanced manner while better magnetic properties are maintained.
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公开(公告)号：US20210134499A1
公开(公告)日：2021-05-06
申请号：US17090710
申请日：2020-11-05
Inventor： Yang Luo , Zhongkai Wang , Yuanfei Yang , Zilong Wang , Dunbo Yu , Yifan Liao , Jiajun Xie , Zhou Hu
Abstract: The invention discloses a composite rare earth anisotropic bonded magnet and a preparation method thereof. The composite rare earth anisotropic bonded magnet comprises a Nd—Fe—B magnetic powder, a Sm—Fe—N magnetic powder, a binder and an inorganic nano-dispersant. The preparation method comprises steps of preparing a Nd—Fe—B magnetic powder by a HDDR method, preparing a Sm—Fe—N magnetic powder by a powder metallurgy method, mixing the Nd—Fe—B magnetic powder, the Sm—Fe—N magnetic powder, the binder and the inorganic nano-dispersant at a specific ratio to finally obtain the composite rare earth anisotropic bonded magnet. The invention, by adding an inorganic nano-dispersant, enables the full dispersion of the fine Sm—Fe—N powder during the mixing process of the binder, the Nd—Fe—B magnetic powder and the Sm—Fe—N powder, and thus makes the fine Sm—Fe—N powder and the binder evenly coated on the surface of the anisotropic Nd—Fe—B magnetic powder.
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