NdFeB Magnet's componet is very complex,there are some of knowledge about its as following:

Rare Earth Neodymium: about the magnet about 15% of the entire composition;Praseodymium Rare Earth: about the magnet about 15% of the entire composition;Rail: about to about 60% of magnet components;Aluminum: about to about 5% of magnet components;RE Di: about 1.5% of magnetic components;Other: about 3.5% of magnetic components;

Of course, every company's ingredients are confidential, there can only share with them about the bar, there is a some Rare Earth manufacturers in order to price interest, did not separate the rare earth lanthanum and cesium, which, once mixed with rare earth magnet materials, components inside, will lead to magnets used in 3 - 5 years later, slowly from the magnet inside the central decomposition, that time may be a magnet is a pile of powder, so that an absolute magnet can not be used in electronic products,