摘要
The year 2007 witnesses the 24^(th)anniversary of the invention of sintered NdFeB magnets.Magnetic energy product of sintered NdFeB magnets has been increased to 474kJ/m^3 (59.5MGO_e)from primary 279kJ/m^3(35MGO_e)in 1983.Global output of sintered magnets had risen to around 50,000 tons in 2006 from tess than 1 ton in 1983. Considering the
The year 2007 witnesses the 24^th anniversary of the invention of sintered NdFeB magnets. Magnetic energy product of sintered NdFeB magnets has been increased to 474kJ/m^3 （59.SMGOe） from primary 279kJ/m^3 （35MGOe） in 1983. Global output of sintered magnets had risen to around 50,000 tons in 2006 from less than 1 ton in 1983. Considering the production of bonded magnets, the total yield reached 55,540 tons. Output proportion between sintered and bonded NdFeB magnets was 9：1. Production value of global NdFeB magnet industry reached US $ 2.88 billion today, including US $2.44 billion of sintered magnets and 0.44 billion of bonded magnets From 1940s to 1960s, Alnico was the principle commercial magnet. By the end of 1960s, permanent ferrite took the place of Alnico. It is estimated that NdFeB magnet will be the leading commercial magnet after 2010. Nowadays,
