NdFeB is the most widely used magnetic material due to the highest specific energy density and low cost of production. This rare earth material is composed of the elements neodymium, iron and boron. Magnets of NdFeB are colloquially called neodymium magnets. They are very versatile because of their properties. NdFeB magnets are permanent magnets with a given direction of magnetization (anisotropic) and behave extremely stable against demagnetizing fields.
What Does Neodymium Magnets Use For:
- Generators and electric motors
- Magnet adhesive systems
- Hall sensors (as encoder magnets)
- filter systems
Limitations of Neodymium Magnets:
- The operating temperature of magnets, depending on the grade, like the N grade, in most cases only 80 ° C. and the H grade, the maximum temperature is 230 ° C. But even you buy N grade, it does not mean the magnet must be supported the 80° C. If the thickness is thin, that will be lost magnetic in 75° C or lower.
- Due to the high iron content of the neodymium magnets, these tend to corrosion. So it need coating material.
- High sensitivity to impact or pressure load
Coatings of Neodymium Magnets:
The neodymium magnets are delivered with the following two coatings:
- NiCuNi nickel coating (shiny metallic)
- Zn Coating
- Black/Grey epoxy coating
Usage notes of neodymium magnets:
Please read the warnings before using magnets. Neodymium magnets can be attached by gluing or snapping. If the neodymium magnet is attached to a magnetic object, you should make a previous test with a magnet between the magnet and the object, for example, fabric or polystyrene.
Neodymium magnets in different shapes and sizes
Neodymium magnets can be found in the form of discs, cuboids, cubes, rods, rings or balls and in different sizes. So you get the Neodymium magnets in cubic form, for example, in sizes between 1mm and 20mm. But lots of manufacturers do not like to produce the magnet smaller than 1mm, because that is hard to produce. Even the China magnet manufacturer. If you ask them, you would find that the 1mm magnet’s price is higher than the 2mm. And most of the time, they will increase the MOQ.