In the process of selecting magnets, the most used are ferrite and neodymium iron boron magnets. Some pay more attention to magnetic force, some pay more attention to cheapness and temperature resistance. Next, the magnet manufacturer Beilun Mingke will introduce ferrite to you. What is the maximum working temperature of the body and the neodymium iron boron magnet?
The maximum operating temperature of the magnet depends on the magnetic properties of the magnet itself and the selection of the operating point. The working point of the magnet can be expressed by the permeability of the magnet. For the same magnet, the higher the permeability of the magnetic circuit (that is, the closer the magnetic circuit), the higher the maximum use temperature of the magnet, and the more stable the performance of the magnet. Therefore, the maximum operating temperature of the magnet is not a certain value, but changes with the degree of closure of the magnetic circuit.
The upper limit of normal heat-resistant working temperature of neodymium iron boron magnet: 80℃; Curie temperature 310℃;
The upper limit of high-temperature-resistant neodymium iron boron magnet heat-resistant working temperature: 200℃, Curie temperature 340～400℃;
The upper limit of the heat-resistant working temperature of ferrite magnet: 250℃; Curie temperature 450-460℃.
The maximum working temperature of the magnet is not only affected by the Curie temperature, but also related to the intrinsic coercivity and working state.