Friends who are familiar with magnets are aware that iron boron magnets are currently recognised in the magnetic materials market as high-performance and cost-effective magnet goods. They are intended for use in a variety of high-tech industries, including national defence and military, electronic technology, and medical equipment, motors, electrical appliances, electronic appliances, and other fields. The more they are used, the easier it is to identify issues. Among these, the demagnetization of iron-boron strong magnets in high temperature settings has received a lot of interest.First and foremost, we must understand why NeFeB demagnetizes in high temperature environments.
The physical structure of Ne iron boron determines why it demagnetizes in high temperature environments. In general, a magnet can generate a magnetic field because the electrons transported by the material itself rotate around the atoms in a specific direction, resulting in a magnetic field force that has an immediate impact on surrounding connected matters. However, particular temperature conditions must be met for electrons to revolve around atoms in a specific orientation. Temperature tolerance varies between magnetic materials. When the temperature rises too high, electrons stray from their original orbit, which leads to chaos. This At this point, the magnetic material’s local magnetic field will be disrupted, resulting in demagnetization.The demagnetization temperature of metal iron boron is generally determined by its specific composition, magnetic field strength, and heat treatment history. The demagnetization temperature range for gold iron boron is typically between 150 and 300 degrees Celsius (302 and 572 degrees Fahrenheit). Within this temperature range, ferromagnetic characteristics gradually deteriorate until they are lost completely.
Several successful solutions to NeFeB magnet high-temperature demagnetization:
First and foremost, do not overheat the NeFeB magnet product. Keep a close eye on its critical temperature. An conventional NeFeB magnet’s critical temperature is typically around 80 degrees Celsius (176 degrees Fahrenheit). Adjust its working environment as soon as possible. Demagnetization can be reduced by raising the temperature.
Second, it is to begin with technology to improve the performance of products employing hairpin magnets so that they can have a warmer structure and are less susceptible to environmental influences.
Third, with the same magnetic energy product, you can select high coercivity materials. If that fails, you can only surrender a small amount of magnetic energy product in order to achieve a higher coercivity.
PS: Each material has different characteristics, so choose the appropriate and economical one, and consider it carefully when designing, otherwise it will cause losses!
Guess you are also interested in: How to reduce or prevent thermal demagnetization and oxidation of iron boron, resulting in Decreased coercivity?
Answer: This is a problem with thermal demagnetization. It is indeed difficult to control. Pay attention to the control of temperature, time and vacuum degree during demagnetization.
At what frequency will the iron-boron magnet vibrate and become demagnetized?
The magnetism of the permanent magnet will not be demagnetized due to frequency vibration, and the high-speed motor will not be demagnetized even when the speed reaches 60,000 rpm.
The above magnet content is compiled and shared by Hangzhou Magnet Power Technology Co., Ltd. If you have any other magnet questions, please feel free to consult online customer service!
Post time: Oct-23-2023
