A method for improving the magnetic properties of sintered NdFeB thin slice magnets
A technology of neodymium iron boron and magnetic properties, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve problems such as difficult to realize industrialization, achieve high uniformity of distribution and thickness consistency, and improve the coercive force of magnetic sheets , Improve the effect of tissue structure and composition
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] Embodiment 1: A method for improving the magnetic properties of sintered NdFeB thin-plate magnets, comprising the following steps:
[0025] ① Preparation of heavy rare earth compound powder, the heavy rare earth compound is DyF3, and the particle size of the powder is ≤10 μm;
[0026] ② Disperse the heavy rare earth compound powder in absolute ethanol, mix well to obtain a suspension, and the viscosity of absolute ethanol at normal temperature and pressure is 1.08mpa.s.
[0027] ③Spray the suspension evenly on the surface of the sintered NdFeB thin sheet magnet to form a coating, and the sintered NdFeB thin sheet magnet has been surface pretreated before spraying;
[0028] ④ Dry the sprayed sintered NdFeB thin-slice magnets. The drying process is to keep warm at 80 ° C for 1 hour, and the dried sintered NdFeB thin-slice magnets are stored in an inert gas environment;
[0029] ⑤ Put the dried sintered NdFeB thin sheet magnet at a pressure of 1×10 -4 In the inert gas en...
Embodiment 2
[0038] Embodiment 2: A method for improving the magnetic properties of sintered NdFeB flake magnets, comprising the following steps:
[0039] ① Preparation of heavy rare earth compound powder, the heavy rare earth compound is DyF3, and the particle size of the powder is ≤10 μm;
[0040] ② Disperse the heavy rare earth compound powder in a mixed solvent with a viscosity of about 4.0mpa.s at room temperature and pressure obtained by mixing absolute ethanol and ethylene glycol, and stir evenly to obtain a suspension.
[0041] ③Spray the suspension evenly on the surface of the sintered NdFeB thin sheet magnet to form a coating, and the sintered NdFeB thin sheet magnet has been surface pretreated before spraying;
[0042] ④ Dry the sprayed sintered NdFeB thin-slice magnets. The drying process is to keep warm at 120 ° C for 1 hour, and the dried sintered NdFeB thin-slice magnets are stored in an inert gas environment;
[0043] ⑤ Put the dried sintered NdFeB thin sheet magnet at a p...
Embodiment 3
[0049] Embodiment three: a method for improving the magnetic performance of a sintered NdFeB thin slice magnet, comprising the following steps:
[0050] ① Preparation of heavy rare earth compound powder, the heavy rare earth compound is DyF3, and the particle size of the powder is ≤10 μm;
[0051] ② Disperse the heavy rare earth compound powder in the pva solution prepared by 1788 type polyvinyl alcohol and water. The mass percentage of 1788 type polyvinyl alcohol is 7%. The viscosity under normal pressure is 26mpa.s.
[0052] ③Spray the suspension evenly on the surface of the sintered NdFeB thin sheet magnet to form a coating, and the sintered NdFeB thin sheet magnet has been surface pretreated before spraying;
[0053] ④ Dry the sprayed sintered NdFeB thin-slice magnets. The drying process is to keep warm at 120 ° C for 1 hour, and the dried sintered NdFeB thin-slice magnets are stored in an inert gas environment;
[0054] ⑤ Put the dried sintered NdFeB thin sheet magnet a...
PUM
| Property | Measurement | Unit |
|---|---|---|
| viscosity | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More