China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Small rare earth magnets refer to small-sized magnets made of rare earth materials, often only a few millimeters in length or width. They are mainly used in industries such as precision electronics, instruments, and communications. Below are 10 popular topics and answers about them.
1. What is the main material of small rare earth magnets?
Small rare earth magnets usually refer to neodymium iron boron (NdFeB) magnets, which contain rare earth metal elements such as neodymium, iron, and boron, and have high magnetic properties. But what we still need to know is that small samarium cobalt magnets can also be called small rare earth magnets.
2. Why are small rare-earth magnets so powerful?
The high magnetic properties of small rare-earth magnets stem from the rare-earth elements in their structure. These elements exhibit high “magnetic crystalline anisotropy,” meaning their atomic magnetic moments readily align in one direction, generating a strong magnetic field.
Illustration shows a curved neodymium magnet and a bread-shaped magnet.
3. What are the applications of small rare earth magnets?
Small rare-earth magnets are widely used in motors, speakers, hard disk drives, power tools, humanoid robots, medical equipment, smart home devices, and military applications.
4. How corrosion-resistant are small rare earth magnets?
For neodymium magnets, the surface is prone to oxidation and typically requires a coating (such as nickel or zinc plating) to enhance corrosion resistance, especially in humid environments. Samarium cobalt magnets, however, do not require plating.
5. How is the strength of small rare earth magnets evaluated?
The strength of rare earth magnets is typically measured by residual magnetic flux density (Br), coercivity (Hc), and maximum energy product (BHmax). Refer to the relevant magnetic property rating data sheets for details.
6. Can small rare earth magnets be recycled?
Small rare earth magnets can be recycled, and rare earth elements can be extracted after recycling, but the recycling process is complex and costly.
7. How small can a small rare earth magnet be made?
Rare earth magnets in circular (disc) form can be processed to a diameter of approximately 0.5mm, while block-shaped small rare earth magnets can be processed to a length of approximately 1mm.
8. What shapes can small rare earth magnets be processed into?
Typical shapes include circular, block (rectangular), cylindrical, and arc-shaped. Of course, we can accommodate special shapes as well, including tolerances.
9. Can small rare earth magnets lose their magnetism? How can their magnetic properties be maintained?
Yes, for instance when exposed to temperatures exceeding the magnet's tolerance, strong opposing magnetic fields, or severe impacts.
10. What is the lead time for small rare earth magnets?
This depends on the complexity of processing and the quantity required. Typically, production can be completed within 7 to 10 days (excluding shipping time).
Our company specializes in manufacturing micro rare earth magnets, mini ferrite magnets, ultra-thin magnets, and high-precision magnets. If you wish to purchase any of these, please send us your magnet technical specifications.
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