Neodymium Magnet

Neodymium Magnet introduced a whole new era to the magnet industries. It is one of the most inexpensive materials with the highest maximum strength. Sintered Neodymium magnets offer the highest energy per unit volume of any permanent magnet materials. It can lift up to 1000 times its own weight. With its powerful strength, the magnets no longer need to be big in order to obtain the required strength needed. A design no longer needs to be limited by size. Current energy levels of Neodymium Magnets start at 33 MGO, with up to 52 MGOe having been developed in some company. The intrinsic (jHc) coercive force determines the maximum operating temperature however it should be noted that even the EH (high coercivity) 180¡ãC degree materials still have a poor temperature coefficient which means that an open circuit magnet can lose about 0.10% of Remanence per ¡ãC. These loses are called Reversible Losses and the Remanence will recover as the temperature fails. Generally the higher coercivity is achieved by doping the alloy with Dysprosium or Cobalt at the expense of the Iron content.

A vast section of standard disc & blocks sizes are available from our stock, non-standard sizes can be manufactured using diamond slicing or grinding techniques at short notice. Apart from temperature difficulties Neodymium magnets also suffers from corrosion because of its high iron content and although the magnets are normally supplied coated particular care must be taken to avoid Hydrogen or salt water environments.