Neodymium magnets (NdFeB)

The name of these magnets comes from the presence of the rare earth element neodymium (Nd) in the alloy.

Among all known ferromagnetic alloys, this one has the highest residual magnetization Br, coercive force Hc and maximum magnetic energy (MH)max. Due to their extremely high magnetic characteristics and relatively low price, these magnets are increasingly used in powerful electric motors and generators, miniature sensors and converters, fastening elements, etc.

Their main disadvantage is the low maximum operating temperature, which for the pure Nd-Fe-B alloy is 80-100°C, but with the help of some additives (mainly cobalt Co) an increase to 200°C is achieved.

WARNING!

Neodymium magnets are very hard, relatively fragile and at the same time with a great force of attraction to each other.

Therefore, in order to avoid injuries and accidents when When working with large neodymium magnets, please follow these rules:

• Do not let two neodymium magnets fall freely against each other. This will cause a strong impact and breakage of the magnets.
• If possible, work with leather gloves and safety glasses. Thus, in the event of a “pinch” of two magnets, you will largely protect your fingers, and in the event of an accidental drop and impact between the magnets, the flying pieces will not get into your eyes;
• It is desirable that there are no iron objects on the workbench, as well as magnetic cards, electronics and magnetically sensitive devices in the immediate vicinity;
• Separate them carefully by sliding them apart. After separating one magnet, move it far enough away from the other magnets or iron objects;
• The magnets should be reattached to each other or to an iron surface very carefully and smoothly by sliding, holding firmly;
• If you are temporarily placing them on an iron surface, place a non-magnetic material 3-5 mm thick under them;

The table and graphs below give the magnetic characteristics and demagnetization curves of the neodymium magnets we offer.