Why does the magnetic field of NdFeB permanent magnets decrease in summer?
Neodymium iron boron, also known as neodymium iron boron magnet (NdFeBmagnet), is a tetragonal crystal composed of neodymium, iron, and boron (Nd2Fe14B). Some netizens asked why the magnetic field of NdFeB permanent magnets is reduced in summer? Let's get to know it together.
Let's first talk about the effect of temperature on NdFeB magnets?
Ambient temperature
Since sintered NdFeB is extremely sensitive to working temperature, the instantaneous highest temperature and the highest sustained highest temperature of the environment may cause different degrees of demagnetization to the magnet, including reversible and irreversible, recoverable and irreversible.
Maximum working temperature
The temperature limitation of NdFeB magnets has led to the development of a series of grades of magnets to adapt to different operating temperature requirements. Please refer to our performance catalog to compare the operating temperature ranges of various grades of magnets. It is necessary to confirm the maximum operating temperature before choosing a neodymium iron boron magnet.
Curie temperature
The Curie temperature of NdFeB is 320°C-460°C. The Curie temperature or magnetic transition point refers to the temperature at which the material can change between ferromagnetic and paramagnetic, that is, the ferroelectric transforms from the ferroelectric phase to the paraelectric phase引的phase transition temperature. The temperature corresponding to the disappearance of ferromagnetism is the Curie point temperature.
Note: With the increase of natural temperature in summer, the magnetic field and magnetic flux of the magnet will decrease with the increase of temperature, especially the difference between the data measured from the north and the south is very large.
