公开(公告)号：US09725620B2

公开(公告)日：2017-08-08

申请号：US14412366

申请日：2013-11-07

Applicant: GRIREM ADVANCED MATERIALS CO., LTD.

Inventor： Xiaowei Huang ,  Ying Yu ,  Zhiqi Long ,  Liangshi Wang ,  Dali Cui ,  Yongke Hou ,  Meisheng Cui

IPC: B24D3/00 ,  B24D3/02 ,  B24D11/00 ,  B24D18/00 ,  C09K3/14 ,  C09G1/02

CPC classification number: C09G1/02

Abstract: The present invention provides a cerium oxide based composite polishing powder and a preparation method thereof. The polishing powder contains the element magnesium in an amount of 0.005 wt %-5 wt % to magnesium oxide meter. The preparation method includes: (1) uniformly mixing a salt solution containing cerium serving as the main component of the polishing powder; (2) uniformly mixing a precipitating agent of an aqueous magnesium bicarbonate solution with the mixed solution prepared in step (1) to obtain a slurry; (3) aging the slurry prepared in step (2) for 0-48 h while the temperature of the slurry is kept at 30-90 degrees centigrade, and filtering the aged slurry to obtain the precursor powder of the polishing powder; (4) calcinating the precursor powder at 600-1000 degrees centigrade, then dispersing and separating the calcinated precursor powder to obtain the polishing powder. The present invention improves the polishing performance and the suspension performance of polishing powder.

公开(公告)号：US20150040725A1

公开(公告)日：2015-02-12

申请号：US14380060

申请日：2012-07-02

Applicant: GRIREM ADVANCED MATERIALS CO., LTD.

Inventor： Yang Luo ,  Hongwei Li ,  Dunbo Yu ,  Kuoshe Li ,  Wenlong Yan ,  Jiajun Xie ,  Shuai Lu

IPC: H01F1/057 ,  H01F1/055 ,  H01F1/059

CPC classification number: H01F1/0578 ,  B22F1/0018 ,  B22F2001/0033 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/30 ,  H01F1/0551 ,  H01F1/0571 ,  H01F1/059 ,  H01F1/083 ,  B22F9/08 ,  B22F2009/0816 ,  B22F9/04 ,  B22F1/0085 ,  B22F1/0088 ,  B22F2201/02 ,  B22F2201/013 ,  B22F2201/016

Abstract: The application discloses a rare-earth permanent magnetic powder, a bonded magnet, and a device using the bonded magnet. The rare-earth permanent magnetic powder comprises 4 to 12 at. % of Nd, 0.1 to 2 at. % of C, 10 to 25 at. % of N and 62.2 to 85.9 at. % of T, wherein T is Fe or FeCo and the main phase of the rare-earth permanent magnetic powder is a hard magnetic phase with a TbCu7 structure. Material volatilization can be avoided effectively during a preparation process of the rare earth permanent magnetic powder, thus improving the wettability with a water-cooling roller during the preparation process and final prepared materials are provided with good magnetic properties.

Abstract translation: 本申请公开了稀土永磁粉末，粘结磁体和使用粘结磁体的装置。 稀土永磁粉由4〜12at。 ％的Nd，0.1〜2at。 C％，10〜25℃。 N的百分比为62.2〜85.9。 T的％，其中T是Fe或FeCo，稀土永磁粉的主相是具有TbCu7结构的硬磁相。 在稀土永磁粉的制备过程中可以有效地避免物质挥发，从而在制备过程中通过水冷辊提高润湿性，最终制备的材料具有良好的磁性能。

公开(公告)号：US12142403B2

公开(公告)日：2024-11-12

申请号：US17331544

申请日：2021-05-26

Applicant: GRIREM HI-TECH CO., LTD. ,  GRIREM ADVANCED MATERIALS CO.,LTD. ,  Grirem (Rongcheng) Co., Ltd.

Inventor： Yang Luo ,  Yuanfei Yang ,  Zilong Wang ,  Dunbo Yu ,  Jiajun Xie ,  Kaiwen Wu ,  Yifan Liao ,  Jichen Jia

IPC: H01F1/055 ,  H01F1/057 ,  H01F1/058 ,  H01F1/059 ,  H01F1/113 ,  H01F7/02 ,  H01F41/02

Abstract: 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.

公开(公告)号：US11932793B2

公开(公告)日：2024-03-19

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

IPC: C09K11/77 ,  C09K11/02 ,  H01L33/50

CPC classification number: C09K11/7774 ,  C09K11/02 ,  H01L33/502 ,  C01P2004/84

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

公开(公告)号：US11932790B2

公开(公告)日：2024-03-19

申请号：US17254224

申请日：2019-07-09

Applicant: Grirem Advanced Materials Co., Ltd

Inventor： Xiaoxia Chen ,  Yuanhong Liu ,  Ronghui Liu ,  Yuan Xue

IPC: C09K11/77 ,  C01G15/00 ,  H01L33/50

CPC classification number: C09K11/7708 ,  C01G15/006 ,  C09K11/7776 ,  H01L33/502 ,  C01P2002/52 ,  C01P2002/72 ,  H01L2933/0041

Abstract: Disclosed are a red light and near-infrared light-emitting material and a preparation method thereof, and a light-emitting device including the light-emitting material. The red light and near-infrared light-emitting material contains a compound represented by a molecular formula, aSc2O3·Ga2O3·bR2O3, wherein the element R includes one or two of Cr, Ni, Fe, Yb, Nd or Er; 0.001≤a≤0.6; and 0.001≤b≤0.1. The light-emitting material can be excited by a spectrum having a wide wavelength range (ultraviolet light or purple light or blue light) to emit light with a wide spectrum of 650 nm to 1700 nm or multiple spectra, thus having higher light-emitting intensity.

公开(公告)号：US20220372368A1

公开(公告)日：2022-11-24

申请号：US17441927

申请日：2020-10-30

Applicant: GRIREM ADVANCED MATERIALS CO., LTD. ,  Rare Earth Functional Materials (Xiong 'an) Innovation Center Co., Ltd. ,  GUOKE RE ADVANCED MATERIALS CO., LTD

Inventor： Jinqiu YU ,  Liang LUO ,  Chengpeng DIAO ,  Lei CUI ,  Hao WU ,  Huaqiang HE

IPC: C09K11/77 ,  C30B29/12 ,  C30B11/02 ,  C01F17/253 ,  G01T1/202 ,  G01T1/36

Abstract: The present invention relates to a rare earth halide scintillating material. The material has a general chemical formula La1-xCexBr3+y, wherein 0.001x1, and 0.0001y0.1. The rare earth halide scintillating material involved in the present invention has excellent scintillation properties of high light output, high energy resolution, and fast decay.

公开(公告)号：US11505852B2

公开(公告)日：2022-11-22

申请号：US16791088

申请日：2020-02-14

Applicant: GRIREM ADVANCED MATERIALS CO., LTD.

Inventor： Yang Luo ,  Xiao Lin ,  Guiyong Wu ,  Jiajun Xie ,  Zilong Wang ,  Wenlong Yan ,  Zhongkai Wang ,  Dunbo Yu

IPC: C22C38/00 ,  H01F1/059 ,  H01F41/02 ,  B22F9/04 ,  B22F1/00

Abstract: 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.

公开(公告)号：US11495376B2

公开(公告)日：2022-11-08

申请号：US16612294

申请日：2018-06-20

Applicant: GRIREM ADVANCED MATERIALS CO., LTD. ,  GUOKE RE ADVANCED MATERIALS CO., LTD.

Inventor： Yang Luo ,  Hongbin Zhang ,  Zhou Hu ,  Dunbo Yu ,  Ningtao Quan ,  Yuanfei Yang ,  Wenlong Yan ,  Jiajun Xie

IPC: B22F1/02 ,  H01F1/057 ,  C22C38/00 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  B22F1/16

Abstract: The present invention discloses rare earth-bonded magnetic powder and a preparation method therefor. The bonded magnetic powder is of a multilayer core-shell structure, and comprises a core layer and an antioxidant layer (3), wherein the core layer is formed by RFeMB, R is Nd and/or PrNd, and M is one or more of Co, Nb, and Zr; and the core layer is coated with an iron-nitrogen layer (2). In addition, the present invention also discloses the preparation method for the rare earth-bonded magnetic powder and a bonded magnet. The oxidation and corrosion of magnetic raw powder during phosphorization and subsequent treatment process are effectively prevented, thereby further improving the long-term temperature resistance and environmental tolerance of the material.

公开(公告)号：US20210375514A1

公开(公告)日：2021-12-02

申请号：US17331531

申请日：2021-05-26

Applicant: GRIREM HI-TECH CO., LTD. ,  GRIREM ADVANCED MATERIALS CO.,LTD. ,  Grirem (Rongcheng) Co., Ltd.

Inventor： Yang LUO ,  Yuanfei YANG ,  Zilong WANG ,  Dunbo YU ,  Hongbin ZHANG ,  Jiajun XIE ,  Zhou HU ,  Zhongkai WANG

IPC: H01F1/057 ,  H01F41/02 ,  B22F7/06 ,  C22C38/00

Abstract: 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.

公开(公告)号：US20210343459A1

公开(公告)日：2021-11-04

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: H01F1/22 ,  H01F7/02 ,  C22C38/00 ,  C22C38/10 ,  C22C38/06 ,  C22C38/16 ,  C22C38/14

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.