Magnet permanent magnet ferrite is used in many industries such as electronic devices, electronic computers, vehicles, mechanical equipment, power energy, and medical equipment because of its high magnetic energy product and high coercive force of NdFeB magnets. The magnetic field of NdFeB magnets is divided into sintered NdFeB magnets and bonded NdFeB magnets. At this stage, the production process of sintered NdFeB permanent magnets is the preparation of raw materials in advance - casting and smelting - crushing and grinding - pressing - calcining - aging - inspection.
Does the coercivity of NdFeB magnets affect the magnetic flux? Hcj Intrinsic Permeability The magnetic induction intensity in the opposite direction required to reduce the magnetization of the magnetic field to zero is called intrinsic permeability, and its unit of quantity is the same as that of permeability. The type of magnetic material is divided according to its intrinsic magnetic permeability. Low permeability N, medium level permeability M, high coercivity H, extraordinary high permeability UH, extremely high coercivity EH, and supreme permeability TH. The intrinsic magnetic permeability of strong NdFeB magnets will decrease due to the increase in temperature. Therefore, in the case of choosing and applying strong NdFeB magnets, you must select a suitable model for everyone.
Higher operating temperature: The ambient temperature limit of NdFeB magnets and rare earth permanent magnets has led to developing a series of magnetite grades to meet different operating temperature specifications. Before choosing strong NdFeB magnets, it is necessary to determine the maximum operating temperature. The heat resistance of NdFeB magnets is not very good. At this stage, the high is 200 degrees of samarium cobalt, and the magnetic energy product of 30 can withstand 300 degrees. After reducing the magnetic loss, it can be 450 degrees.
NdFeB has a very high magnetic permeability and coercivity of NdFeB magnets, and it is not easy to demagnetize and magnetize under normal circumstances and general electromagnetic field standards. Assuming a moderate natural environment, the magnetic energy of the magnetic field will not be damaged very much even through the long-term application. Therefore, in specific applications, people usually ignore the harm of the duration factor to the magnetic energy.
Comparison of coercivity of samarium cobalt magnets: samarium cobalt magnets are relatively expensive, have stable magnetic permeability and maintain good temperature characteristics, but are replaced by neodymium iron boron magnets in many cases, samarium cobalt magnets are more suitable than neodymium iron boron magnets Working in a high-temperature ring mirror.
