Neodymium (chemical symbol Nd) is element 60 on the periodic table. It is a rare earth metal and forms one of the Lanthanides series. When added to Iron (Fe) and Boron (B) (chemical formula Nd14Fe21B) the resultant adhesive magnets are the strongest magnets currently available. Neodymium magnets are sometimes known as Neo, or NIB magnets.
NdFeB magnets mainly composed of neodymium iron and boron, is the third generation of the rare-earth permanent magnets. Sintered NdFeB is the strongest permanent magnets in the world up to date.
It has the advantages of high magnetic remanence, coercive force, and magnetic energy product. It can be manufactured into all kinds of shapes and sizes. It is widely used in electric appliance, medical apparatus, office automation appliance, toys, magnetic finery, etc.
Their uses are very varied but care must be taken because they are brittle and do not flex. They are normally only safe for use below 80oC/176oF although we do stock some high and extra high operating temperature magnets. Neodymium rare earth permanent magnets are widely applied in Auto, energy-efficient voice coil Motors and Generators, Machinery, Audio/Video, and Communication Equipment, Medical Device(MRI), Office Automation, Magnetic Separator, etc.
Smaller adhesive magnets are often used for jewelry clasps, magnetic therapy jewelry, magnetic earrings (one each side of the ear), fridge magnets, model train connectors, Scalextric vehicles, re-born dolls, wargaming models, motors, science projects etc. Larger rare earth magnets are used for science projects, actuators, separators, speakers, pumps, magnetic therapy and circuit breakers in power stations.
Neodymium magnets are usually coated to prevent the iron from rusting. Normally this is a Nickel-Copper-Nickel plating, however, Zinc, Tin, Black Nickel, Gold and Silver plating are also used as are Epoxy resin and PTFE (better known under the brand name Teflon). The Gold and Silver plated magnets are often used to make homemade magnetic therapy jewelry. They are particularly used as a number of spheres to make necklaces or bracelets.