accueil Materials Neodymium-Iron-Boron

—————————————    NEODYNIUM-IRON-BORON MAGNETS    —————————————


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.

HOLDING FORCE

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

MECHANICAL RESISTANCE


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).
 
Nuances N35
Br Typique (T) 1,21
Hcb Typique (kA/m) 890
Hcj Typique (kA/m) 955
BH max Typique (kJ/m³) 279
80°C maximum
 
Euromag

Manufacturer since 1870

contact details

199, avenue d’Uriage
38830 Saint Pierre d’Allevard
FRANCE
Phone : +33 4 76 45 98 81
E-mail : info@euromag-magnets.com

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