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Due to the rapid development of electric vehicles, wind power generation, energy-saving home appliances and other industries in recent years, relatively higher performance requirements are also put forward for permanent magnets, such as the current high magnetic energy product, high coercive sintered Ndfeb magnets are the focus of current research. Through the unremitting efforts and hard work of the relevant researchers, through the composition optimization, grain refinement, grain boundary modification, low temperature sintering and other technical preparation process, effectively improve the microstructure, and develop a stable ultra-high performance Ndfeb magnet mass production process. Baotou has successfully developed ultra-high performance sintered NdFeb magnet products with the maximum magnetic energy product coercivity greater than 78, which will mark the technical level of sintered NdFeb permanent magnet material pilot products to a new level. Moreover, this technology also gives full play to the role of heavy rare earth dysprosium and terbium in sintered NdFeb permanent magnet materials, and also meets the high performance requirements of permanent magnets such as new energy vehicles and energy-saving permanent magnet motors.