Neodymium Iron-Boron magnets are sintered magnets composed of Neodymium, iron and bore powder. A nickel, zinc or epoxyd coating is necessary to protect this material against corrosion (due to agressive environment). Density 7,5.
▶Magnetic force is optimal when the magnet is in contact with a mild steel frame, flat, clean and rather thick. It is lower with allied steels and cast iron (less 30% for cast iron).
▶ It is lower in presence of an air gap (space between the part to magnetize and the polar face of the magnet).
▶ It is decreasing by 0.22% every degree C by propitious circuits (see besides curve).
INDUCTION ON SURFACE
▶ The maximum value of induction in surface at 20°C is about 5000 Gauss for Neodymium Ferbore flat pot magnets.
▶ This value is decreasing by 0,22% every degree C when temperature is increasing
▶These ceramics are very fragile.
▶They must be handled carefully.
▶To avoid magnets attraction during handling we advise to put them on a mild steel plate.
▶Do not shock or squeeze.
RESISTANCE TO TEMPERATURE
▶ Maximal working temperature is about 80°C, because of Hcj sensitivity to temperature (0.66% every degree C).
▶The induction losses are reversible so far we stay in the limit of working temperature of the material. It is 80°C in open circuit with standard grade. There are several NdFeB grades up to 180°C.
➔Would you like to know more about the composition, main characteristics, and applications of Ferrites magnets ? Clik here
➔We also invite you to consult our catalogue products.
|▶Neodymium Iron-Boron magnets have the highest magnetic energy (BH Max) at room temperature.
▶There are a lot of various grades according to different working temperatures.
▶The grade most used for our standard magnets available in this catalogue is N35 (max. 80°C working temperature).