Bonded NdFeB Magnets VS Sintered Neodymium Magnets
Preparation Method of Bonded Neodymium Magnets
Preparation of bonded NdFeB magnets adopts MQ or HDDR to produce magnetic powder.
MQ
The melted ingots are poured on rotating water-cooling copper roller, which can make non-crystal or micro-crystal thin strips. Rough particles (about 200Pm), after proper heat treatment, will be changed into nano-state.
HDDR
Ingots are treated by hydrogen. Through hydrogenation, disproportion, desorption and crystallization, micro-powder comes into being.
Through slight breaking, MQ or HDDR powder can make into bonded neodymium powder. Bonded NdFeB magnets are produced by compression molding, injection molding and other method, using magnetic powder mixed with high-molecule compounds, such as epoxy. MQ are mainly used to manufacture various kinds of isotropic permanent magnets. Magnetic powder of HDDRA can be made into isotropic and anisotropic bonded neodymium magnets.
Advantage and Disadvantage of Preparation Method of Bonded Neodymium Magnets
Performance of bonded neodymium magnets is less excellent than that of sintered neodymium magnets , but they, with more precise sizes and simpler techniques, are more stable, easier to produce in batch.
Preparation of bonded NdFeB magnets adopts MQ or HDDR to produce magnetic powder.
MQ
The melted ingots are poured on rotating water-cooling copper roller, which can make non-crystal or micro-crystal thin strips. Rough particles (about 200Pm), after proper heat treatment, will be changed into nano-state.
HDDR
Ingots are treated by hydrogen. Through hydrogenation, disproportion, desorption and crystallization, micro-powder comes into being.
Through slight breaking, MQ or HDDR powder can make into bonded neodymium powder. Bonded NdFeB magnets are produced by compression molding, injection molding and other method, using magnetic powder mixed with high-molecule compounds, such as epoxy. MQ are mainly used to manufacture various kinds of isotropic permanent magnets. Magnetic powder of HDDRA can be made into isotropic and anisotropic bonded neodymium magnets.
Advantage and Disadvantage of Preparation Method of Bonded Neodymium Magnets
Performance of bonded neodymium magnets is less excellent than that of sintered neodymium magnets , but they, with more precise sizes and simpler techniques, are more stable, easier to produce in batch.
