Abstract: Provided are a NdFeB magnet with high-performance and high-thermal-stability and a preparation method thereof, and relates to the technical field of a NdFEB magnet. The NdFEB magnet of the present application includes a main phase Re2Fe14B, a grain boundary phase containing Re and a rare earth-rich phase, where the grain boundary phase includes a first grain boundary phase and a second grain boundary phase, the first grain boundary phase is a Ga+Cu-rich amorphous phase at a grain boundary triangle region, and the second grain boundary phase is a Ga+Cu-rich amorphous grain boundary phase formed among adjacent main phase grains, and a mass content ratio of Cu to Ga in the magnet is 1.8 to 10. The present application improves the thermal stability of the magnet by transforming the Re-rich grain boundary phase into an amorphous phase.

Abstract: Provided herein are pharmaceutical formulations comprising glucokinase activator, or a prodrug, or a pharmaceutically acceptable salt, an isotope labeled analogue, a crystalline form, a hydrate, a solvate, or a diastereomeric or enantiomeric form thereof and the use thereof for treating diseases; the pharmaceutical formulations are in the form of immediate-release formulations, extended-release formulations, or combination of immediate-release formulation and extended-release formulations. The pharmaceutical formulations achieved once-a-day therapy for some diseases, in particular, type II Diabetes Mellitus with obesity. The pharmaceutical formulations exhibit sustained 24 hours of glucose-lowering effects. The pharmaceutical formulations also achieved lower Cmax, extended T1/2 as well as maintained similar bioavailability and increased MRT compared with commercial Dorzagliatin tablet, enhanced the pharmacology effect of restoring the glucose stimulated GLP-1 secretion in diabetes with obesity.

Abstract: The disclosure relates to the technical field of sintered type NdFeB permanent magnets, in particular to a high temperature resistant magnet. There is provided a preparation method for the magnet including a step of preparing a mixture of the NdFeB alloy flakes and a low melting point powder, wherein the low melting point powder comprises at least one of NdCu, NdAl and NdGa.

Abstract: Some embodiments of the invention belongs to a technical field of NdFeB magnet processing, and mainly relates to a device and method for improving the coercivity of ring-shaped NdFeB magnet. A layer of heavy rare earth coating is sprayed on the inner and outer surfaces of the ring-shaped NdFeB magnet by the device, and then the ring-shaped NdFeB magnet sprayed with the heavy rare-earth coating is subjected to diffusion treatment to improve the coercivity of the ring-shaped NdFeB magnet. The invention uses heavy rare earth slurry as the diffusion source, combined with spraying technology, can quickly and uniformly cover a layer of heavy rare earth coating on the inner and outer surfaces of the ring-shaped NdFeB magnet, and the coercivity of the ring-shaped NdFeB magnet is improved after heat treatment.

Abstract: A gradient Nd—Fe—B magnet includes an Nd—Fe—B magnet block extending along a magnetization direction and having a plurality of surfaces perpendicular to the magnetization direction. A first film, is disposed on one of the surfaces. A second film is disposed on another one of the surfaces, opposite of the one of the surfaces. The first film and the second film are diffused into the Nd—Fe—B magnet block dividing the Nd—Fe—B magnet block into an edge region, a transition region, and a central region along a plane perpendicular to the magnetization direction wherein the edge region has a coercivity that remains constant in a direction perpendicular to the magnetization direction, and the coercivity, along said magnetization direction, gradually decreases from the one of the surfaces and the another one of the surfaces towards a point located therebetween. A method of making the gradient Nd—Fe—B magnet is disclosed herein.

Abstract: Some embodiments of the present disclosure provide a permanent magnet for low eddy-current loss of a permanent magnet motor and a permanent magnet motor. The permanent magnet includes a first magnetic pole surface, a second magnetic pole surface, four side surfaces, and a plurality of embedded electrical insulation layers. The first magnetic pole surface is basically orthogonal to a magnetization direction of the permanent magnet. The second magnetic pole surface is parallel to the first magnetic pole surface. The plurality of embedded electrical insulation layers are parallel to the magnetization direction of the permanent magnet; and at least one edge of each embedded electrical insulation layer is neither parallel nor perpendicular to the magnetization direction of the permanent magnet.

Abstract: The disclosure relates to the technical field of sintered type NdFeB permanent magnets, in particular to a low-cost rare earth magnet and manufacturing method. There is provided a method of preparing a high-coercivity sintered NdFeB magnet including cerium comprising the following steps: (S1) providing alloy flakes composed of RxT(1-x-y-z)ByMz; (S2) mixing the alloy flakes, a low melting point powder, and a lubricant, then subjecting the mixture to a hydrogen embrittlement process followed in this order by pulverizing the process product to an alloy powder by jet milling, magnetic field orientation molding of the allow powder to obtain a blank, sintering and aging treatment the blank; (S3) coating a film composed of a diffusion source of formula R1xR2yHzM1-x-y-z on the sintered NdFeB magnet; and (S4) performing a diffusion heat treatment, followed by aging the sintered NdFeB magnet to obtain the low-cost rare earth magnet.

Abstract: The present disclosure provides a method for increasing the coercivity of a sintered type NdFeB permanent magnet. The method comprises: a) coating of a slurry on a surface of the magnet, the slurry comprising first particles consisting of a heavy rare earth alloy or a heavy rare earth or a non-metallic compound, and second particles consisting of a metal alloy or a meta, wherein at least one of the first particles and second particles includes at least one of Dy and Tb and wherein a ratio of the average particle diameter between the second particles and the first particles is 2:1 to 20:1; b) performing a vibration of the coated magnet in vertical direction of the applied slurry with a vibration frequency of 10 Hz to 50 Hz for 30 s to 5 min, then drying the slurry; and c) performing a thermally induced grain boundary diffusion process.

Abstract: The present disclosure relates to the technical field of neodymium-iron-boron preparation, in particular to a method for improving the coercivity of a neodymium-iron-boron magnet and a magnet prepared by the method. The method specifically includes: (S1) subjecting a heavy rare earth diffusion source powder, an organic adhesive, a spherical high temperature resistant ceramic powder and an organic solvent to mixing and stirring to prepare a heavy rare earth slurry; (S2) coating a surface of a neodymium-iron-boron magnet with the heavy rare earth slurry and drying the heavy rare earth slurry to form a heavy rare earth coating; and (S3) performing high-temperature diffusion and aging treatment. According to the method above, the heavy rare earth coating has high hardness and strength. In addition, the neodymium-iron-boron magnet has higher and more uniform properties after diffusion, and less heavy rare earth elements are consumed.

Abstract: The invention relates to a method of increasing the coercivity of a sintered type NdFeB permanent magnet. The method comprises the following steps: a) preparing of an organic film with a predetermined thickness on a surface of the sintered type NdFeB permanent magnet; b) creating holes in the organic film according to a given pattern with the holes extending to the surface of the sintered type NdFeB permanent magnet; c) filling the holes with a metal powder, the metal powder including or consisting of at least one of Dy and Tb; and d) performing a thermally induced grain boundary diffusion process.

Abstract: The disclosure refers to a NdFeB alloy powder for forming high-coercivity sintered NdFeB magnets. The NdFeB alloy powder includes NdFeB alloy core particles with a multi-layered coating, wherein the multi-layered coating comprises: a first metal layer directly disposed on the NdFeB alloy core particles, wherein the first metal layer consists of at least one of Tb and Dy; a second metal layer directly disposed on the first metal layer, wherein the second metal layer consists of at least one of W, Mo, Ti, Zr, and Nb; and a third metal layer directly disposed on the second metal layer, wherein the third metal layer consists of (i) at least one of Pr, Nd, La, and Ce; or (ii) a combination of one of the group consisting of Cu, Al, and Ga and at least one of the group consisting of Pr, Nd, La, and Ce.

Abstract: The present disclosure discloses a cerium-added RE-T-B-M series sintered neodymium-iron-boron magnet, which relates to the technical field of neodymium-iron-boron permanent magnets, the structure of the magnet contains a RE2Fe14B main phase, a RE-rich phase, a REFe2 phase, and a sandwich grain boundary phase, wherein the sandwich grain boundary phase includes a RE-rich phase, a Fe-rich phase, and a REFe2 phase, and in the sandwich grain boundary phase, starting from the side near the grains of RE2Fe14B main phase, the first layer is the RE-rich phase, the second layer is the Fe-rich phase, and the third layer is the REFe2 phase, where RE includes cerium element and at least one of other rare earth elements, and the cerium element accounts for 3.0-15.0% by mass of the total elements, T is iron element and cobalt element, B is boron element, and M is Al, Cu, Ga, and Ti elements.

Abstract: The disclosure relates to a preparation device and method of forming a ceramic coating on a sintered type NdFeB permanent magnet. The preparation device comprises a holding barrel, a pump body, a spraying system, and a fixture mechanism. The pump body is connected with the holding barrel and the spraying system and the spraying system is located above the fixture mechanism and there is a distance between the spraying system and the fixture mechanism. The fixture mechanism is connected with a recovery bucket through a pipeline, and the recovery bucket is connected with the holding barrel through the pipeline. The spraying system comprises a nozzle, wherein the inlet of the nozzle is connected with the pipeline of the pump body. The fixture mechanism comprises a support plate, an upper recovery trough plate and a lower recovery trough plate, wherein the lower recovery trough plate is located above the support plate.

Abstract: The disclosure provides a preparation method, which comprises: providing a moulding die for a ring-shaped sintered Nd—Fe—B magnet; placing a Nd—Fe—B magnetic powder into the mould cavity of the moulding die in a loosely packed state, the loosely packed height of the Nd—Fe—B magnetic powder is L; placing a flexible cylindrical core into the loosely packed Nd—Fe—B magnetic powder at a L/2 position, wherein an axial direction of the flexible cylindrical core is horizontal and parallel to the direction of a magnetic field in the mould cavity; applying a vertical pressure to the Nd—Fe—B magnetic powder to obtain a ring-shaped green block assembly with the flexible cylindrical core embedded; after encapsulating and isolating the ring-shaped green block assembly, applying an isostatic pressure to the ring-shaped green block assembly; sintering the ring-shaped green block assembly to obtain a ring-shaped sintered blank; thermally aging, grinding and slicing the ring-shaped sintered blank.

Abstract: The present disclosure provides a method for preparing a high-coercivity sintered NdFeB magnet. The method including the steps of: S1, Providing a NdFeB powder as a main material; S2, Vacuum coating a layer of a rare earth alloy RxH(100-x) on a surface of a metal nano-powder M to obtain an auxiliary alloy material with a core-shell structure, with R being selected from one or more of Dy, Tb, Pr, Nd, La, and Ce; H being selected from one or more of Cu, Al, and Ga; the nano-powder M being selected from one or more of Mo, W, Zr, Ti, and Nb; 0?x?90 wt. %; S3, Adding the auxiliary alloy material obtained by step S2 to the NdFeB powder of step S1 and mixing, then orientation pressing of the mixture to obtain a compact body; and S4, Sintering and annealing treatment of the compact body to obtain the high-coercivity sintered NdFeB magnet.

Abstract: The present disclosure provides a rare earth magnet and manufacturing method thereof, which belongs to the field of rare earth magnet technology. The diffusion source is coated on the NdFeB base material, which is diffused and aged to obtain NdFeB magnet. The diffusion source alloy is R?M?B?Fe100-?-?-?, wherein R refers to at least one of Nd and Pr, and M Refers to at least one of Al, Cu, Ga. The Br reduction range is lower than 0.03 T, and Hcj growth is more than 318 kA/m.

Abstract: The present disclosure provides an NdFeB rare earth magnet and manufacturing method thereof, which belongs to the field of rare earth magnet technology. The production method of diffusion source is to coat a layer of non-heavy rare earth alloy film on the diffusion source sheet, and aging treatment are carried out to form diffusion source. The diffusion source is R?RH?M?B?Fe100-?-?-?-?. The chemical formula of the non-heavy rare earth alloy film is RnMm. The chemical formula of NdFeB magnet base material is RaM1bM2cBdFe100-a-b-c-d. The performance NdFeB by diffusion source containing Dy have ?Hcj>636.8 kA/m and containing Tb have ?Hcj>875.6 kA/m, containing DyTb have ?Hcj>716.4 kA/m.

Abstract: The disclosure relates to a method for improving the coercivity of an arc-shaped Nd—Fe—B magnet. A method for increasing the coercivity of an arc-shaped Nd—Fe—B magnet is provided. Said method comprises the steps of: a) providing of a flexible film with a heavy rare earth coating thereon, wherein the heavy rare earth coating comprises at least one of Dy and Tb; b) arranging the arc-shaped Nd—Fe—B magnet and the flexible film such that a first curved surface of the arc-shaped Nd—Fe—B magnet and the heavy rare earth coating on the flexible film are facing each other; such that a curved surface of the first ceramic body lies on the side of the flexible film opposite the arc-shaped Nd—Fe—B magnet, then pressing the first ceramic body and the magnet together; and d) performing a thermally induced grain boundary diffusion process.

Abstract: The present disclosure refers to a method for preparing sintered NdFeB magnets, including: a) Preparing alloy flakes from a raw material by strip casting, performing a hydrogen decrepitation to produce alloy pieces, pulverization the alloy pieces to an alloy powder, performing molding and orientation, cold isostatic pressing, and getting a green compact; b) Putting the green compact into a vacuum furnace and performing a first sintering step in 830 to 880° C. for 2 to 10 hours and 5×10?1 Pa or less; c) Performing a second sintering step while applying a pressure to the green compact achieved by step b), the pressure is 1 MPa to 5 MPa and the sintering temperature is 720 to 850° C. for 15 to 60 minutes, and the temperature of the first sintering step is at least 10° C. higher than that of the second sintering step; d) Subjecting the sintered magnet of step c) to an annealing treatment.

Abstract: The disclosure discloses a NdFeB permanent magnet and a preparation method thereof. The magnet is composed of main phase I, a shell structure, a grain boundary phase adjacent to the shell structure, a main phase II, a Ga rich region and a Cu rich region. The magnet has high remanence, high coercivity, and high magnetic energy. In addition, this method can significantly reduce the production cost.